20871508

素因数分解:

$2^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{7237}}^1$

素因数の和:7351

約数の個数: 24

約数和(自身を含む): 42154112

約数和(自身を除く): 21282604

約数列:

[1, 2, 4, 7, 14, 28, 103, 206, 412, 721, 1442, 2884, 7237, 14474, 28948, 50659, 101318, 202636, 745411, 1490822, 2981644, 5217877, 10435754, 20871508]

約数ペア:

[(1, 20871508), (2, 10435754), (4, 5217877), (7, 2981644), (14, 1490822), (28, 745411), (103, 202636), (206, 101318), (412, 50659), (721, 28948), (1442, 14474), (2884, 7237)]