20487745

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{1009}}^1$

素因数の和:1176

約数の個数: 16

約数和(自身を含む): 25597440

約数和(自身を除く): 5109695

約数列:

[1, 5, 31, 131, 155, 655, 1009, 4061, 5045, 20305, 31279, 132179, 156395, 660895, 4097549, 20487745]

約数ペア:

[(1, 20487745), (5, 4097549), (31, 660895), (131, 156395), (155, 132179), (655, 31279), (1009, 20305), (4061, 5045)]