19815580

素因数分解:

$2^2\times 5^1\times {\mathrm{887}}^1\times {\mathrm{1117}}^1$

素因数の和:2013

約数の個数: 24

約数和(自身を含む): 41696928

約数和(自身を除く): 21881348

約数列:

[1, 2, 4, 5, 10, 20, 887, 1117, 1774, 2234, 3548, 4435, 4468, 5585, 8870, 11170, 17740, 22340, 990779, 1981558, 3963116, 4953895, 9907790, 19815580]

約数ペア:

[(1, 19815580), (2, 9907790), (4, 4953895), (5, 3963116), (10, 1981558), (20, 990779), (887, 22340), (1117, 17740), (1774, 11170), (2234, 8870), (3548, 5585), (4435, 4468)]