21090925

素因数分解:

$5^2\times {\mathrm{37}}^1\times {\mathrm{151}}^2$

素因数の和:349

約数の個数: 18

約数和(自身を含む): 27038634

約数和(自身を除く): 5947709

約数列:

[1, 5, 25, 37, 151, 185, 755, 925, 3775, 5587, 22801, 27935, 114005, 139675, 570025, 843637, 4218185, 21090925]

約数ペア:

[(1, 21090925), (5, 4218185), (25, 843637), (37, 570025), (151, 139675), (185, 114005), (755, 27935), (925, 22801), (3775, 5587)]