18977620

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{22067}}^1$

素因数の和:22119

約数の個数: 24

約数和(自身を含む): 40781664

約数和(自身を除く): 21804044

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 22067, 44134, 88268, 110335, 220670, 441340, 948881, 1897762, 3795524, 4744405, 9488810, 18977620]

約数ペア:

[(1, 18977620), (2, 9488810), (4, 4744405), (5, 3795524), (10, 1897762), (20, 948881), (43, 441340), (86, 220670), (172, 110335), (215, 88268), (430, 44134), (860, 22067)]