21214960

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20399}}^1$

素因数の和:20425

約数の個数: 40

約数和(自身を含む): 53121600

約数和(自身を除く): 31906640

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20399, 40798, 81596, 101995, 163192, 203990, 265187, 326384, 407980, 530374, 815960, 1060748, 1325935, 1631920, 2121496, 2651870, 4242992, 5303740, 10607480, 21214960]

約数ペア:

[(1, 21214960), (2, 10607480), (4, 5303740), (5, 4242992), (8, 2651870), (10, 2121496), (13, 1631920), (16, 1325935), (20, 1060748), (26, 815960), (40, 530374), (52, 407980), (65, 326384), (80, 265187), (104, 203990), (130, 163192), (208, 101995), (260, 81596), (520, 40798), (1040, 20399)]