20703580

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{2531}}^1$

素因数の和:2949

約数の個数: 24

約数和(自身を含む): 43601040

約数和(自身を除く): 22897460

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 2531, 4090, 5062, 8180, 10124, 12655, 25310, 50620, 1035179, 2070358, 4140716, 5175895, 10351790, 20703580]

約数ペア:

[(1, 20703580), (2, 10351790), (4, 5175895), (5, 4140716), (10, 2070358), (20, 1035179), (409, 50620), (818, 25310), (1636, 12655), (2045, 10124), (2531, 8180), (4090, 5062)]