81943640

素因数分解:

$2^3\times 5^1\times {\mathrm{523}}^1\times {\mathrm{3917}}^1$

素因数の和:4451

約数の個数: 32

約数和(自身を含む): 184772880

約数和(自身を除く): 102829240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 523, 1046, 2092, 2615, 3917, 4184, 5230, 7834, 10460, 15668, 19585, 20920, 31336, 39170, 78340, 156680, 2048591, 4097182, 8194364, 10242955, 16388728, 20485910, 40971820, 81943640]

約数ペア:

[(1, 81943640), (2, 40971820), (4, 20485910), (5, 16388728), (8, 10242955), (10, 8194364), (20, 4097182), (40, 2048591), (523, 156680), (1046, 78340), (2092, 39170), (2615, 31336), (3917, 20920), (4184, 19585), (5230, 15668), (7834, 10460)]