1728025

素因数分解:

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

素因数の和:445

約数の個数: 18

約数和(自身を含む): 2325930

約数和(自身を除く): 597905

約数列:

[1, 5, 13, 25, 65, 169, 325, 409, 845, 2045, 4225, 5317, 10225, 26585, 69121, 132925, 345605, 1728025]

約数ペア:

[(1, 1728025), (5, 345605), (13, 132925), (25, 69121), (65, 26585), (169, 10225), (325, 5317), (409, 4225), (845, 2045)]