20640290

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{187639}}^1$

素因数の和:187657

約数の個数: 16

約数和(自身を含む): 40530240

約数和(自身を除く): 19889950

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 187639, 375278, 938195, 1876390, 2064029, 4128058, 10320145, 20640290]

約数ペア:

[(1, 20640290), (2, 10320145), (5, 4128058), (10, 2064029), (11, 1876390), (22, 938195), (55, 375278), (110, 187639)]