399998975

素因数分解:

$5^2\times {\mathrm{389}}^1\times {\mathrm{41131}}^1$

素因数の和:41530

約数の個数: 12

約数和(自身を含む): 497285880

約数和(自身を除く): 97286905

約数列:

[1, 5, 25, 389, 1945, 9725, 41131, 205655, 1028275, 15999959, 79999795, 399998975]

約数ペア:

[(1, 399998975), (5, 79999795), (25, 15999959), (389, 1028275), (1945, 205655), (9725, 41131)]