21272620

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{10531}}^1$

素因数の和:10641

約数の個数: 24

約数和(自身を含む): 45119088

約数和(自身を除く): 23846468

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 10531, 21062, 42124, 52655, 105310, 210620, 1063631, 2127262, 4254524, 5318155, 10636310, 21272620]

約数ペア:

[(1, 21272620), (2, 10636310), (4, 5318155), (5, 4254524), (10, 2127262), (20, 1063631), (101, 210620), (202, 105310), (404, 52655), (505, 42124), (1010, 21062), (2020, 10531)]