81973825

素因数分解:

$5^2\times {\mathrm{409}}^1\times {\mathrm{8017}}^1$

素因数の和:8436

約数の個数: 12

約数和(自身を含む): 101908780

約数和(自身を除く): 19934955

約数列:

[1, 5, 25, 409, 2045, 8017, 10225, 40085, 200425, 3278953, 16394765, 81973825]

約数ペア:

[(1, 81973825), (5, 16394765), (25, 3278953), (409, 200425), (2045, 40085), (8017, 10225)]