21279505

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{443}}^1\times {\mathrm{739}}^1$

素因数の和:1200

約数の個数: 16

約数和(自身を含む): 27599040

約数和(自身を除く): 6319535

約数列:

[1, 5, 13, 65, 443, 739, 2215, 3695, 5759, 9607, 28795, 48035, 327377, 1636885, 4255901, 21279505]

約数ペア:

[(1, 21279505), (5, 4255901), (13, 1636885), (65, 327377), (443, 48035), (739, 28795), (2215, 9607), (3695, 5759)]