18009905

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{211}}^1\times {\mathrm{397}}^1$

素因数の和:656

約数の個数: 16

約数和(自身を含む): 22275264

約数和(自身を除く): 4265359

約数列:

[1, 5, 43, 211, 215, 397, 1055, 1985, 9073, 17071, 45365, 83767, 85355, 418835, 3601981, 18009905]

約数ペア:

[(1, 18009905), (5, 3601981), (43, 418835), (211, 85355), (215, 83767), (397, 45365), (1055, 17071), (1985, 9073)]