220820

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{181}}^1$

素因数の和:251

約数の個数: 24

約数和(自身を含む): 473928

約数和(自身を除く): 253108

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 181, 244, 305, 362, 610, 724, 905, 1220, 1810, 3620, 11041, 22082, 44164, 55205, 110410, 220820]

約数ペア:

[(1, 220820), (2, 110410), (4, 55205), (5, 44164), (10, 22082), (20, 11041), (61, 3620), (122, 1810), (181, 1220), (244, 905), (305, 724), (362, 610)]