81868521

素因数分解:

$3^1\times 7^1\times {\mathrm{191}}^1\times {\mathrm{20411}}^1$

素因数の和:20612

約数の個数: 16

約数和(自身を含む): 125411328

約数和(自身を除く): 43542807

約数列:

[1, 3, 7, 21, 191, 573, 1337, 4011, 20411, 61233, 142877, 428631, 3898501, 11695503, 27289507, 81868521]

約数ペア:

[(1, 81868521), (3, 27289507), (7, 11695503), (21, 3898501), (191, 428631), (573, 142877), (1337, 61233), (4011, 20411)]