20869225

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{409}}^1$

素因数の和:589

約数の個数: 24

約数和(自身を含む): 28114520

約数和(自身を除く): 7245295

約数列:

[1, 5, 13, 25, 65, 157, 325, 409, 785, 2041, 2045, 3925, 5317, 10205, 10225, 26585, 51025, 64213, 132925, 321065, 834769, 1605325, 4173845, 20869225]

約数ペア:

[(1, 20869225), (5, 4173845), (13, 1605325), (25, 834769), (65, 321065), (157, 132925), (325, 64213), (409, 51025), (785, 26585), (2041, 10225), (2045, 10205), (3925, 5317)]