21137540

素因数分解:

$2^2\times 5^1\times {\mathrm{953}}^1\times {\mathrm{1109}}^1$

素因数の和:2071

約数の個数: 24

約数和(自身を含む): 44475480

約数和(自身を除く): 23337940

約数列:

[1, 2, 4, 5, 10, 20, 953, 1109, 1906, 2218, 3812, 4436, 4765, 5545, 9530, 11090, 19060, 22180, 1056877, 2113754, 4227508, 5284385, 10568770, 21137540]

約数ペア:

[(1, 21137540), (2, 10568770), (4, 5284385), (5, 4227508), (10, 2113754), (20, 1056877), (953, 22180), (1109, 19060), (1906, 11090), (2218, 9530), (3812, 5545), (4436, 4765)]