81778925

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{193}}^1\times {\mathrm{997}}^1$

素因数の和:1217

約数の個数: 24

約数和(自身を含む): 108035496

約数和(自身を除く): 26256571

約数列:

[1, 5, 17, 25, 85, 193, 425, 965, 997, 3281, 4825, 4985, 16405, 16949, 24925, 82025, 84745, 192421, 423725, 962105, 3271157, 4810525, 16355785, 81778925]

約数ペア:

[(1, 81778925), (5, 16355785), (17, 4810525), (25, 3271157), (85, 962105), (193, 423725), (425, 192421), (965, 84745), (997, 82025), (3281, 24925), (4825, 16949), (4985, 16405)]