20899915

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1\times {\mathrm{521}}^1$

素因数の和:710

約数の個数: 16

約数和(自身を含む): 25707456

約数和(自身を除く): 4807541

約数列:

[1, 5, 71, 113, 355, 521, 565, 2605, 8023, 36991, 40115, 58873, 184955, 294365, 4179983, 20899915]

約数ペア:

[(1, 20899915), (5, 4179983), (71, 294365), (113, 184955), (355, 58873), (521, 40115), (565, 36991), (2605, 8023)]