28640225

素因数分解:

$5^2\times {\mathrm{409}}^1\times {\mathrm{2801}}^1$

素因数の和:3220

約数の個数: 12

約数和(自身を含む): 35613420

約数和(自身を除く): 6973195

約数列:

[1, 5, 25, 409, 2045, 2801, 10225, 14005, 70025, 1145609, 5728045, 28640225]

約数ペア:

[(1, 28640225), (5, 5728045), (25, 1145609), (409, 70025), (2045, 14005), (2801, 10225)]