20718905

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{3323}}^1$

素因数の和:3400

約数の個数: 16

約数和(自身を含む): 26326080

約数和(自身を除く): 5607175

約数列:

[1, 5, 29, 43, 145, 215, 1247, 3323, 6235, 16615, 96367, 142889, 481835, 714445, 4143781, 20718905]

約数ペア:

[(1, 20718905), (5, 4143781), (29, 714445), (43, 481835), (145, 142889), (215, 96367), (1247, 16615), (3323, 6235)]