21920665

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^2\times {\mathrm{401}}^1$

素因数の和:477

約数の個数: 24

約数和(自身を含む): 29411928

約数和(自身を除く): 7491263

約数列:

[1, 5, 13, 29, 65, 145, 377, 401, 841, 1885, 2005, 4205, 5213, 10933, 11629, 26065, 54665, 58145, 151177, 337241, 755885, 1686205, 4384133, 21920665]

約数ペア:

[(1, 21920665), (5, 4384133), (13, 1686205), (29, 755885), (65, 337241), (145, 151177), (377, 58145), (401, 54665), (841, 26065), (1885, 11629), (2005, 10933), (4205, 5213)]