21096920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1399}}^1$

素因数の和:1452

約数の個数: 64

約数和(自身を含む): 52920000

約数和(自身を除く): 31823080

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 29, 40, 52, 58, 65, 104, 116, 130, 145, 232, 260, 290, 377, 520, 580, 754, 1160, 1399, 1508, 1885, 2798, 3016, 3770, 5596, 6995, 7540, 11192, 13990, 15080, 18187, 27980, 36374, 40571, 55960, 72748, 81142, 90935, 145496, 162284, 181870, 202855, 324568, 363740, 405710, 527423, 727480, 811420, 1054846, 1622840, 2109692, 2637115, 4219384, 5274230, 10548460, 21096920]

約数ペア:

[(1, 21096920), (2, 10548460), (4, 5274230), (5, 4219384), (8, 2637115), (10, 2109692), (13, 1622840), (20, 1054846), (26, 811420), (29, 727480), (40, 527423), (52, 405710), (58, 363740), (65, 324568), (104, 202855), (116, 181870), (130, 162284), (145, 145496), (232, 90935), (260, 81142), (290, 72748), (377, 55960), (520, 40571), (580, 36374), (754, 27980), (1160, 18187), (1399, 15080), (1508, 13990), (1885, 11192), (2798, 7540), (3016, 6995), (3770, 5596)]