20538905

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{1451}}^1$

素因数の和:1624

約数の個数: 16

約数和(自身を含む): 26136000

約数和(自身を除く): 5597095

約数列:

[1, 5, 19, 95, 149, 745, 1451, 2831, 7255, 14155, 27569, 137845, 216199, 1080995, 4107781, 20538905]

約数ペア:

[(1, 20538905), (5, 4107781), (19, 1080995), (95, 216199), (149, 137845), (745, 27569), (1451, 14155), (2831, 7255)]