21578440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2441}}^1$

素因数の和:2482

約数の個数: 64

約数和(自身を含む): 55384560

約数和(自身を除く): 33806120

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 52, 65, 68, 85, 104, 130, 136, 170, 221, 260, 340, 442, 520, 680, 884, 1105, 1768, 2210, 2441, 4420, 4882, 8840, 9764, 12205, 19528, 24410, 31733, 41497, 48820, 63466, 82994, 97640, 126932, 158665, 165988, 207485, 253864, 317330, 331976, 414970, 539461, 634660, 829940, 1078922, 1269320, 1659880, 2157844, 2697305, 4315688, 5394610, 10789220, 21578440]

約数ペア:

[(1, 21578440), (2, 10789220), (4, 5394610), (5, 4315688), (8, 2697305), (10, 2157844), (13, 1659880), (17, 1269320), (20, 1078922), (26, 829940), (34, 634660), (40, 539461), (52, 414970), (65, 331976), (68, 317330), (85, 253864), (104, 207485), (130, 165988), (136, 158665), (170, 126932), (221, 97640), (260, 82994), (340, 63466), (442, 48820), (520, 41497), (680, 31733), (884, 24410), (1105, 19528), (1768, 12205), (2210, 9764), (2441, 8840), (4420, 4882)]