18887620

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{2309}}^1$

素因数の和:2727

約数の個数: 24

約数和(自身を含む): 39778200

約数和(自身を除く): 20890580

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 2309, 4090, 4618, 8180, 9236, 11545, 23090, 46180, 944381, 1888762, 3777524, 4721905, 9443810, 18887620]

約数ペア:

[(1, 18887620), (2, 9443810), (4, 4721905), (5, 3777524), (10, 1888762), (20, 944381), (409, 46180), (818, 23090), (1636, 11545), (2045, 9236), (2309, 8180), (4090, 4618)]