18539020

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{21557}}^1$

素因数の和:21609

約数の個数: 24

約数和(自身を含む): 39839184

約数和(自身を除く): 21300164

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 21557, 43114, 86228, 107785, 215570, 431140, 926951, 1853902, 3707804, 4634755, 9269510, 18539020]

約数ペア:

[(1, 18539020), (2, 9269510), (4, 4634755), (5, 3707804), (10, 1853902), (20, 926951), (43, 431140), (86, 215570), (172, 107785), (215, 86228), (430, 43114), (860, 21557)]