320426980

素因数分解:

$2^2\times 5^1\times {\mathrm{1861}}^1\times {\mathrm{8609}}^1$

素因数の和:10479

約数の個数: 24

約数和(自身を含む): 673336440

約数和(自身を除く): 352909460

約数列:

[1, 2, 4, 5, 10, 20, 1861, 3722, 7444, 8609, 9305, 17218, 18610, 34436, 37220, 43045, 86090, 172180, 16021349, 32042698, 64085396, 80106745, 160213490, 320426980]

約数ペア:

[(1, 320426980), (2, 160213490), (4, 80106745), (5, 64085396), (10, 32042698), (20, 16021349), (1861, 172180), (3722, 86090), (7444, 43045), (8609, 37220), (9305, 34436), (17218, 18610)]