20311820

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{181}}^2$

素因数の和:402

約数の個数: 36

約数和(自身を含む): 44275392

約数和(自身を除く): 23963572

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 181, 310, 362, 620, 724, 905, 1810, 3620, 5611, 11222, 22444, 28055, 32761, 56110, 65522, 112220, 131044, 163805, 327610, 655220, 1015591, 2031182, 4062364, 5077955, 10155910, 20311820]

約数ペア:

[(1, 20311820), (2, 10155910), (4, 5077955), (5, 4062364), (10, 2031182), (20, 1015591), (31, 655220), (62, 327610), (124, 163805), (155, 131044), (181, 112220), (310, 65522), (362, 56110), (620, 32761), (724, 28055), (905, 22444), (1810, 11222), (3620, 5611)]