20518491

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{23831}}^1$

素因数の和:23882

約数の個数: 16

約数和(自身を含む): 32030208

約数和(自身を除く): 11511717

約数列:

[1, 3, 7, 21, 41, 123, 287, 861, 23831, 71493, 166817, 500451, 977071, 2931213, 6839497, 20518491]

約数ペア:

[(1, 20518491), (3, 6839497), (7, 2931213), (21, 977071), (41, 500451), (123, 166817), (287, 71493), (861, 23831)]