21331521

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{57809}}^1$

素因数の和:57856

約数の個数: 12

約数和(自身を含む): 31564260

約数和(自身を除く): 10232739

約数列:

[1, 3, 9, 41, 123, 369, 57809, 173427, 520281, 2370169, 7110507, 21331521]

約数ペア:

[(1, 21331521), (3, 7110507), (9, 2370169), (41, 520281), (123, 173427), (369, 57809)]