20048020

素因数分解:

$2^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{2381}}^1$

素因数の和:2811

約数の個数: 24

約数和(自身を含む): 42218568

約数和(自身を除く): 22170548

約数列:

[1, 2, 4, 5, 10, 20, 421, 842, 1684, 2105, 2381, 4210, 4762, 8420, 9524, 11905, 23810, 47620, 1002401, 2004802, 4009604, 5012005, 10024010, 20048020]

約数ペア:

[(1, 20048020), (2, 10024010), (4, 5012005), (5, 4009604), (10, 2004802), (20, 1002401), (421, 47620), (842, 23810), (1684, 11905), (2105, 9524), (2381, 8420), (4210, 4762)]