20502005

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{349}}^1\times {\mathrm{379}}^1$

素因数の和:764

約数の個数: 16

約数和(自身を含む): 25536000

約数和(自身を除く): 5033995

約数列:

[1, 5, 31, 155, 349, 379, 1745, 1895, 10819, 11749, 54095, 58745, 132271, 661355, 4100401, 20502005]

約数ペア:

[(1, 20502005), (5, 4100401), (31, 661355), (155, 132271), (349, 58745), (379, 54095), (1745, 11749), (1895, 10819)]