21066580

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{10429}}^1$

素因数の和:10539

約数の個数: 24

約数和(自身を含む): 44682120

約数和(自身を除く): 23615540

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 10429, 20858, 41716, 52145, 104290, 208580, 1053329, 2106658, 4213316, 5266645, 10533290, 21066580]

約数ペア:

[(1, 21066580), (2, 10533290), (4, 5266645), (5, 4213316), (10, 2106658), (20, 1053329), (101, 208580), (202, 104290), (404, 52145), (505, 41716), (1010, 20858), (2020, 10429)]