81615620

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{31151}}^1$

素因数の和:31291

約数の個数: 24

約数和(自身を含む): 172706688

約数和(自身を除く): 91091068

約数列:

[1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310, 2620, 31151, 62302, 124604, 155755, 311510, 623020, 4080781, 8161562, 16323124, 20403905, 40807810, 81615620]

約数ペア:

[(1, 81615620), (2, 40807810), (4, 20403905), (5, 16323124), (10, 8161562), (20, 4080781), (131, 623020), (262, 311510), (524, 155755), (655, 124604), (1310, 62302), (2620, 31151)]