21529885

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{7703}}^1$

素因数の和:7764

約数の個数: 16

約数和(自身を含む): 28473984

約数和(自身を除く): 6944099

約数列:

[1, 5, 13, 43, 65, 215, 559, 2795, 7703, 38515, 100139, 331229, 500695, 1656145, 4305977, 21529885]

約数ペア:

[(1, 21529885), (5, 4305977), (13, 1656145), (43, 500695), (65, 331229), (215, 100139), (559, 38515), (2795, 7703)]