404920225

素因数分解:

$5^2\times {\mathrm{199}}^2\times {\mathrm{409}}^1$

素因数の和:817

約数の個数: 18

約数和(自身を含む): 505870710

約数和(自身を除く): 100950485

約数列:

[1, 5, 25, 199, 409, 995, 2045, 4975, 10225, 39601, 81391, 198005, 406955, 990025, 2034775, 16196809, 80984045, 404920225]

約数ペア:

[(1, 404920225), (5, 80984045), (25, 16196809), (199, 2034775), (409, 990025), (995, 406955), (2045, 198005), (4975, 81391), (10225, 39601)]