21086125

素因数分解:

$5^3\times {\mathrm{43}}^1\times {\mathrm{3923}}^1$

素因数の和:3981

約数の個数: 16

約数和(自身を含む): 26934336

約数和(自身を除く): 5848211

約数列:

[1, 5, 25, 43, 125, 215, 1075, 3923, 5375, 19615, 98075, 168689, 490375, 843445, 4217225, 21086125]

約数ペア:

[(1, 21086125), (5, 4217225), (25, 843445), (43, 490375), (125, 168689), (215, 98075), (1075, 19615), (3923, 5375)]