20018765

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{2351}}^1$

素因数の和:2500

約数の個数: 16

約数和(自身を含む): 26078976

約数和(自身を除く): 6060211

約数列:

[1, 5, 13, 65, 131, 655, 1703, 2351, 8515, 11755, 30563, 152815, 307981, 1539905, 4003753, 20018765]

約数ペア:

[(1, 20018765), (5, 4003753), (13, 1539905), (65, 307981), (131, 152815), (655, 30563), (1703, 11755), (2351, 8515)]