20105555

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{313}}^1\times {\mathrm{443}}^1$

素因数の和:790

約数の個数: 16

約数和(自身を含む): 25094880

約数和(自身を除く): 4989325

約数列:

[1, 5, 29, 145, 313, 443, 1565, 2215, 9077, 12847, 45385, 64235, 138659, 693295, 4021111, 20105555]

約数ペア:

[(1, 20105555), (5, 4021111), (29, 693295), (145, 138659), (313, 64235), (443, 45385), (1565, 12847), (2215, 9077)]