21913640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{1283}}^1$

素因数の和:1362

約数の個数: 64

約数和(自身を含む): 57317760

約数和(自身を除く): 35404120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 61, 70, 122, 140, 244, 280, 305, 427, 488, 610, 854, 1220, 1283, 1708, 2135, 2440, 2566, 3416, 4270, 5132, 6415, 8540, 8981, 10264, 12830, 17080, 17962, 25660, 35924, 44905, 51320, 71848, 78263, 89810, 156526, 179620, 313052, 359240, 391315, 547841, 626104, 782630, 1095682, 1565260, 2191364, 2739205, 3130520, 4382728, 5478410, 10956820, 21913640]

約数ペア:

[(1, 21913640), (2, 10956820), (4, 5478410), (5, 4382728), (7, 3130520), (8, 2739205), (10, 2191364), (14, 1565260), (20, 1095682), (28, 782630), (35, 626104), (40, 547841), (56, 391315), (61, 359240), (70, 313052), (122, 179620), (140, 156526), (244, 89810), (280, 78263), (305, 71848), (427, 51320), (488, 44905), (610, 35924), (854, 25660), (1220, 17962), (1283, 17080), (1708, 12830), (2135, 10264), (2440, 8981), (2566, 8540), (3416, 6415), (4270, 5132)]