21640525

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{1571}}^1$

素因数の和:1629

約数の個数: 24

約数和(自身を含む): 29239200

約数和(自身を除く): 7598675

約数列:

[1, 5, 19, 25, 29, 95, 145, 475, 551, 725, 1571, 2755, 7855, 13775, 29849, 39275, 45559, 149245, 227795, 746225, 865621, 1138975, 4328105, 21640525]

約数ペア:

[(1, 21640525), (5, 4328105), (19, 1138975), (25, 865621), (29, 746225), (95, 227795), (145, 149245), (475, 45559), (551, 39275), (725, 29849), (1571, 13775), (2755, 7855)]