21012125

素因数分解:

$5^3\times {\mathrm{107}}^1\times {\mathrm{1571}}^1$

素因数の和:1693

約数の個数: 16

約数和(自身を含む): 26485056

約数和(自身を除く): 5472931

約数列:

[1, 5, 25, 107, 125, 535, 1571, 2675, 7855, 13375, 39275, 168097, 196375, 840485, 4202425, 21012125]

約数ペア:

[(1, 21012125), (5, 4202425), (25, 840485), (107, 196375), (125, 168097), (535, 39275), (1571, 13375), (2675, 7855)]