<Tr> <Th> 399 </Th> <Td> 1, 3, 7, 19, 21, 57, 133, 399 </Td> <Td> 8 </Td> <Td> 640 </Td> <Td> 241 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 400 </Th> <Td> 1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400 </Td> <Td> 15 </Td> <Td> 961 </Td> <Td> 561 </Td> <Td> abundant, composite </Td> </Tr> <Table> <Tr> <Th> n </Th> <Th> Divisors </Th> <Th> d (n) </Th> <Th> σ (n) </Th> <Th> s (n) </Th> <Th> Notes </Th> </Tr> <Tr> <Th> 401 </Th> <Td> 1, 401 </Td> <Td> </Td> <Td> 402 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 402 </Th> <Td> 1, 2, 3, 6, 67, 134, 201, 402 </Td> <Td> 8 </Td> <Td> 816 </Td> <Td> 414 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 403 </Th> <Td> 1, 13, 31, 403 </Td> <Td> </Td> <Td> 448 </Td> <Td> 45 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 404 </Th> <Td> 1, 2, 4, 101, 202, 404 </Td> <Td> 6 </Td> <Td> 714 </Td> <Td> 310 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 405 </Th> <Td> 1, 3, 5, 9, 15, 27, 45, 81, 135, 405 </Td> <Td> 10 </Td> <Td> 726 </Td> <Td> 321 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 406 </Th> <Td> 1, 2, 7, 14, 29, 58, 203, 406 </Td> <Td> 8 </Td> <Td> 720 </Td> <Td> 314 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 407 </Th> <Td> 1, 11, 37, 407 </Td> <Td> </Td> <Td> 456 </Td> <Td> 49 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 408 </Th> <Td> 1, 2, 3, 4, 6, 8, 12, 17, 24, 34, 51, 68, 102, 136, 204, 408 </Td> <Td> 16 </Td> <Td> 1080 </Td> <Td> 672 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 409 </Th> <Td> 1, 409 </Td> <Td> </Td> <Td> 410 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 410 </Th> <Td> 1, 2, 5, 10, 41, 82, 205, 410 </Td> <Td> 8 </Td> <Td> 756 </Td> <Td> 346 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 411 </Th> <Td> 1, 3, 137, 411 </Td> <Td> </Td> <Td> 552 </Td> <Td> 141 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 412 </Th> <Td> 1, 2, 4, 103, 206, 412 </Td> <Td> 6 </Td> <Td> 728 </Td> <Td> 316 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 413 </Th> <Td> 1, 7, 59, 413 </Td> <Td> </Td> <Td> 480 </Td> <Td> 67 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 414 </Th> <Td> 1, 2, 3, 6, 9, 18, 23, 46, 69, 138, 207, 414 </Td> <Td> 12 </Td> <Td> 936 </Td> <Td> 522 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 415 </Th> <Td> 1, 5, 83, 415 </Td> <Td> </Td> <Td> 504 </Td> <Td> 89 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 416 </Th> <Td> 1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 208, 416 </Td> <Td> 12 </Td> <Td> 882 </Td> <Td> 466 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 417 </Th> <Td> 1, 3, 139, 417 </Td> <Td> </Td> <Td> 560 </Td> <Td> 143 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 418 </Th> <Td> 1, 2, 11, 19, 22, 38, 209, 418 </Td> <Td> 8 </Td> <Td> 720 </Td> <Td> 302 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 419 </Th> <Td> 1, 419 </Td> <Td> </Td> <Td> 420 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 420 </Th> <Td> 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420 </Td> <Td> 24 </Td> <Td> 1344 </Td> <Td> 924 </Td> <Td> abundant, highly abundant, composite </Td> </Tr> <Tr> <Th> n </Th> <Th> Divisors </Th> <Th> d (n) </Th> <Th> σ (n) </Th> <Th> s (n) </Th> <Th> Notes </Th> </Tr> <Tr> <Th> 421 </Th> <Td> 1, 421 </Td> <Td> </Td> <Td> 422 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 422 </Th> <Td> 1, 2, 211, 422 </Td> <Td> </Td> <Td> 636 </Td> <Td> 214 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 423 </Th> <Td> 1, 3, 9, 47, 141, 423 </Td> <Td> 6 </Td> <Td> 624 </Td> <Td> 201 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 424 </Th> <Td> 1, 2, 4, 8, 53, 106, 212, 424 </Td> <Td> 8 </Td> <Td> 810 </Td> <Td> 386 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 425 </Th> <Td> 1, 5, 17, 25, 85, 425 </Td> <Td> 6 </Td> <Td> 558 </Td> <Td> 133 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 426 </Th> <Td> 1, 2, 3, 6, 71, 142, 213, 426 </Td> <Td> 8 </Td> <Td> 864 </Td> <Td> 438 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 427 </Th> <Td> 1, 7, 61, 427 </Td> <Td> </Td> <Td> 496 </Td> <Td> 69 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 428 </Th> <Td> 1, 2, 4, 107, 214, 428 </Td> <Td> 6 </Td> <Td> 756 </Td> <Td> 328 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 429 </Th> <Td> 1, 3, 11, 13, 33, 39, 143, 429 </Td> <Td> 8 </Td> <Td> 672 </Td> <Td> 243 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 430 </Th> <Td> 1, 2, 5, 10, 43, 86, 215, 430 </Td> <Td> 8 </Td> <Td> 792 </Td> <Td> 362 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 431 </Th> <Td> 1, 431 </Td> <Td> </Td> <Td> 432 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 432 </Th> <Td> 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 36, 48, 54, 72, 108, 144, 216, 432 </Td> <Td> 20 </Td> <Td> 1240 </Td> <Td> 808 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 433 </Th> <Td> 1, 433 </Td> <Td> </Td> <Td> 434 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 434 </Th> <Td> 1, 2, 7, 14, 31, 62, 217, 434 </Td> <Td> 8 </Td> <Td> 768 </Td> <Td> 334 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 435 </Th> <Td> 1, 3, 5, 15, 29, 87, 145, 435 </Td> <Td> 8 </Td> <Td> 720 </Td> <Td> 285 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 436 </Th> <Td> 1, 2, 4, 109, 218, 436 </Td> <Td> 6 </Td> <Td> 770 </Td> <Td> 334 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 437 </Th> <Td> 1, 19, 23, 437 </Td> <Td> </Td> <Td> 480 </Td> <Td> 43 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 438 </Th> <Td> 1, 2, 3, 6, 73, 146, 219, 438 </Td> <Td> 8 </Td> <Td> 888 </Td> <Td> 450 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 439 </Th> <Td> 1, 439 </Td> <Td> </Td> <Td> 440 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 440 </Th> <Td> 1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440 </Td> <Td> 16 </Td> <Td> 1080 </Td> <Td> 640 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> n </Th> <Th> Divisors </Th> <Th> d (n) </Th> <Th> σ (n) </Th> <Th> s (n) </Th> <Th> Notes </Th> </Tr> <Tr> <Th> 441 </Th> <Td> 1, 3, 7, 9, 21, 49, 63, 147, 441 </Td> <Td> 9 </Td> <Td> 741 </Td> <Td> 300 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 442 </Th> <Td> 1, 2, 13, 17, 26, 34, 221, 442 </Td> <Td> 8 </Td> <Td> 756 </Td> <Td> 314 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 443 </Th> <Td> 1, 443 </Td> <Td> </Td> <Td> 444 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 444 </Th> <Td> 1, 2, 3, 4, 6, 12, 37, 74, 111, 148, 222, 444 </Td> <Td> 12 </Td> <Td> 1064 </Td> <Td> 620 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 445 </Th> <Td> 1, 5, 89, 445 </Td> <Td> </Td> <Td> 540 </Td> <Td> 95 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 446 </Th> <Td> 1, 2, 223, 446 </Td> <Td> </Td> <Td> 672 </Td> <Td> 226 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 447 </Th> <Td> 1, 3, 149, 447 </Td> <Td> </Td> <Td> 600 </Td> <Td> 153 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 448 </Th> <Td> 1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 112, 224, 448 </Td> <Td> 14 </Td> <Td> 1016 </Td> <Td> 568 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 449 </Th> <Td> 1, 449 </Td> <Td> </Td> <Td> 450 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 450 </Th> <Td> 1, 2, 3, 5, 6, 9, 10, 15, 18, 25, 30, 45, 50, 75, 90, 150, 225, 450 </Td> <Td> 18 </Td> <Td> 1209 </Td> <Td> 759 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 451 </Th> <Td> 1, 11, 41, 451 </Td> <Td> </Td> <Td> 504 </Td> <Td> 53 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 452 </Th> <Td> 1, 2, 4, 113, 226, 452 </Td> <Td> 6 </Td> <Td> 798 </Td> <Td> 346 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 453 </Th> <Td> 1, 3, 151, 453 </Td> <Td> </Td> <Td> 608 </Td> <Td> 155 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 454 </Th> <Td> 1, 2, 227, 454 </Td> <Td> </Td> <Td> 684 </Td> <Td> 230 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 455 </Th> <Td> 1, 5, 7, 13, 35, 65, 91, 455 </Td> <Td> 8 </Td> <Td> 672 </Td> <Td> 217 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 456 </Th> <Td> 1, 2, 3, 4, 6, 8, 12, 19, 24, 38, 57, 76, 114, 152, 228, 456 </Td> <Td> 16 </Td> <Td> 1200 </Td> <Td> 744 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 457 </Th> <Td> 1, 457 </Td> <Td> </Td> <Td> 458 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 458 </Th> <Td> 1, 2, 229, 458 </Td> <Td> </Td> <Td> 690 </Td> <Td> 232 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 459 </Th> <Td> 1, 3, 9, 17, 27, 51, 153, 459 </Td> <Td> 8 </Td> <Td> 720 </Td> <Td> 261 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 460 </Th> <Td> 1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 230, 460 </Td> <Td> 12 </Td> <Td> 1008 </Td> <Td> 548 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> n </Th> <Th> Divisors </Th> <Th> d (n) </Th> <Th> σ (n) </Th> <Th> s (n) </Th> <Th> Notes </Th> </Tr> <Tr> <Th> 461 </Th> <Td> 1, 461 </Td> <Td> </Td> <Td> 462 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 462 </Th> <Td> 1, 2, 3, 6, 7, 11, 14, 21, 22, 33, 42, 66, 77, 154, 231, 462 </Td> <Td> 16 </Td> <Td> 1152 </Td> <Td> 690 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 463 </Th> <Td> 1, 463 </Td> <Td> </Td> <Td> 464 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 464 </Th> <Td> 1, 2, 4, 8, 16, 29, 58, 116, 232, 464 </Td> <Td> 10 </Td> <Td> 930 </Td> <Td> 466 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 465 </Th> <Td> 1, 3, 5, 15, 31, 93, 155, 465 </Td> <Td> 8 </Td> <Td> 768 </Td> <Td> 303 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 466 </Th> <Td> 1, 2, 233, 466 </Td> <Td> </Td> <Td> 702 </Td> <Td> 236 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 467 </Th> <Td> 1, 467 </Td> <Td> </Td> <Td> 468 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 468 </Th> <Td> 1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 117, 156, 234, 468 </Td> <Td> 18 </Td> <Td> 1274 </Td> <Td> 806 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 469 </Th> <Td> 1, 7, 67, 469 </Td> <Td> </Td> <Td> 544 </Td> <Td> 75 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 470 </Th> <Td> 1, 2, 5, 10, 47, 94, 235, 470 </Td> <Td> 8 </Td> <Td> 864 </Td> <Td> 394 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 471 </Th> <Td> 1, 3, 157, 471 </Td> <Td> </Td> <Td> 632 </Td> <Td> 161 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 472 </Th> <Td> 1, 2, 4, 8, 59, 118, 236, 472 </Td> <Td> 8 </Td> <Td> 900 </Td> <Td> 428 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 473 </Th> <Td> 1, 11, 43, 473 </Td> <Td> </Td> <Td> 528 </Td> <Td> 55 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 474 </Th> <Td> 1, 2, 3, 6, 79, 158, 237, 474 </Td> <Td> 8 </Td> <Td> 960 </Td> <Td> 486 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 475 </Th> <Td> 1, 5, 19, 25, 95, 475 </Td> <Td> 6 </Td> <Td> 620 </Td> <Td> 145 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 476 </Th> <Td> 1, 2, 4, 7, 14, 17, 28, 34, 68, 119, 238, 476 </Td> <Td> 12 </Td> <Td> 1008 </Td> <Td> 532 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 477 </Th> <Td> 1, 3, 9, 53, 159, 477 </Td> <Td> 6 </Td> <Td> 702 </Td> <Td> 225 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 478 </Th> <Td> 1, 2, 239, 478 </Td> <Td> </Td> <Td> 720 </Td> <Td> 242 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 479 </Th> <Td> 1, 479 </Td> <Td> </Td> <Td> 480 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 480 </Th> <Td> 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 80, 96, 120, 160, 240, 480 </Td> <Td> 24 </Td> <Td> 1512 </Td> <Td> 1032 </Td> <Td> abundant, highly abundant, composite </Td> </Tr> <Tr> <Th> n </Th> <Th> Divisors </Th> <Th> d (n) </Th> <Th> σ (n) </Th> <Th> s (n) </Th> <Th> Notes </Th> </Tr> <Tr> <Th> 481 </Th> <Td> 1, 13, 37, 481 </Td> <Td> </Td> <Td> 532 </Td> <Td> 51 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 482 </Th> <Td> 1, 2, 241, 482 </Td> <Td> </Td> <Td> 726 </Td> <Td> 244 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 483 </Th> <Td> 1, 3, 7, 21, 23, 69, 161, 483 </Td> <Td> 8 </Td> <Td> 768 </Td> <Td> 285 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 484 </Th> <Td> 1, 2, 4, 11, 22, 44, 121, 242, 484 </Td> <Td> 9 </Td> <Td> 931 </Td> <Td> 447 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 485 </Th> <Td> 1, 5, 97, 485 </Td> <Td> </Td> <Td> 588 </Td> <Td> 103 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 486 </Th> <Td> 1, 2, 3, 6, 9, 18, 27, 54, 81, 162, 243, 486 </Td> <Td> 12 </Td> <Td> 1092 </Td> <Td> 606 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 487 </Th> <Td> 1, 487 </Td> <Td> </Td> <Td> 488 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 488 </Th> <Td> 1, 2, 4, 8, 61, 122, 244, 488 </Td> <Td> 8 </Td> <Td> 930 </Td> <Td> 442 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 489 </Th> <Td> 1, 3, 163, 489 </Td> <Td> </Td> <Td> 656 </Td> <Td> 167 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 490 </Th> <Td> 1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490 </Td> <Td> 12 </Td> <Td> 1026 </Td> <Td> 536 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 491 </Th> <Td> 1, 491 </Td> <Td> </Td> <Td> 492 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 492 </Th> <Td> 1, 2, 3, 4, 6, 12, 41, 82, 123, 164, 246, 492 </Td> <Td> 12 </Td> <Td> 1176 </Td> <Td> 684 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 493 </Th> <Td> 1, 17, 29, 493 </Td> <Td> </Td> <Td> 540 </Td> <Td> 47 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 494 </Th> <Td> 1, 2, 13, 19, 26, 38, 247, 494 </Td> <Td> 8 </Td> <Td> 840 </Td> <Td> 346 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 495 </Th> <Td> 1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495 </Td> <Td> 12 </Td> <Td> 936 </Td> <Td> 441 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 496 </Th> <Td> 1, 2, 4, 8, 16, 31, 62, 124, 248, 496 </Td> <Td> 10 </Td> <Td> 992 </Td> <Td> 496 </Td> <Td> perfect, composite </Td> </Tr> <Tr> <Th> 497 </Th> <Td> 1, 7, 71, 497 </Td> <Td> </Td> <Td> 576 </Td> <Td> 79 </Td> <Td> deficient, composite </Td> </Tr> <Tr> <Th> 498 </Th> <Td> 1, 2, 3, 6, 83, 166, 249, 498 </Td> <Td> 8 </Td> <Td> 1008 </Td> <Td> 510 </Td> <Td> abundant, composite </Td> </Tr> <Tr> <Th> 499 </Th> <Td> 1, 499 </Td> <Td> </Td> <Td> 500 </Td> <Td> </Td> <Td> deficient, prime </Td> </Tr> <Tr> <Th> 500 </Th> <Td> 1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500 </Td> <Td> 12 </Td> <Td> 1092 </Td> <Td> 592 </Td> <Td> abundant, composite </Td> </Tr> </Table> <Tr> <Th> n </Th> <Th> Divisors </Th> <Th> d (n) </Th> <Th> σ (n) </Th> <Th> s (n) </Th> <Th> Notes </Th> </Tr>

Which positive one digit numbers are not divisors of 420
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