21680505

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{6257}}^1$

素因数の和:6286

約数の個数: 48

約数和(自身を含む): 46859904

約数和(自身を除く): 25179399

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 33, 35, 45, 55, 63, 77, 99, 105, 165, 231, 315, 385, 495, 693, 1155, 3465, 6257, 18771, 31285, 43799, 56313, 68827, 93855, 131397, 206481, 218995, 281565, 344135, 394191, 481789, 619443, 656985, 1032405, 1445367, 1970955, 2408945, 3097215, 4336101, 7226835, 21680505]

約数ペア:

[(1, 21680505), (3, 7226835), (5, 4336101), (7, 3097215), (9, 2408945), (11, 1970955), (15, 1445367), (21, 1032405), (33, 656985), (35, 619443), (45, 481789), (55, 394191), (63, 344135), (77, 281565), (99, 218995), (105, 206481), (165, 131397), (231, 93855), (315, 68827), (385, 56313), (495, 43799), (693, 31285), (1155, 18771), (3465, 6257)]