21421895

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{8287}}^1$

素因数の和:8350

約数の個数: 16

約数和(自身を含む): 28643328

約数和(自身を除く): 7221433

約数列:

[1, 5, 11, 47, 55, 235, 517, 2585, 8287, 41435, 91157, 389489, 455785, 1947445, 4284379, 21421895]

約数ペア:

[(1, 21421895), (5, 4284379), (11, 1947445), (47, 455785), (55, 389489), (235, 91157), (517, 41435), (2585, 8287)]