8640125

素因数分解:

$5^3\times {\mathrm{13}}^2\times {\mathrm{409}}^1$

素因数の和:450

約数の個数: 24

約数和(自身を含む): 11704680

約数和(自身を除く): 3064555

約数列:

[1, 5, 13, 25, 65, 125, 169, 325, 409, 845, 1625, 2045, 4225, 5317, 10225, 21125, 26585, 51125, 69121, 132925, 345605, 664625, 1728025, 8640125]

約数ペア:

[(1, 8640125), (5, 1728025), (13, 664625), (25, 345605), (65, 132925), (125, 69121), (169, 51125), (325, 26585), (409, 21125), (845, 10225), (1625, 5317), (2045, 4225)]