90991640

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{10781}}^1$

素因数の和:11003

約数の個数: 32

約数和(自身を含む): 205720560

約数和(自身を除く): 114728920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 4220, 8440, 10781, 21562, 43124, 53905, 86248, 107810, 215620, 431240, 2274791, 4549582, 9099164, 11373955, 18198328, 22747910, 45495820, 90991640]

約数ペア:

[(1, 90991640), (2, 45495820), (4, 22747910), (5, 18198328), (8, 11373955), (10, 9099164), (20, 4549582), (40, 2274791), (211, 431240), (422, 215620), (844, 107810), (1055, 86248), (1688, 53905), (2110, 43124), (4220, 21562), (8440, 10781)]