21163540

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{10477}}^1$

素因数の和:10587

約数の個数: 24

約数和(自身を含む): 44887752

約数和(自身を除く): 23724212

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 10477, 20954, 41908, 52385, 104770, 209540, 1058177, 2116354, 4232708, 5290885, 10581770, 21163540]

約数ペア:

[(1, 21163540), (2, 10581770), (4, 5290885), (5, 4232708), (10, 2116354), (20, 1058177), (101, 209540), (202, 104770), (404, 52385), (505, 41908), (1010, 20954), (2020, 10477)]