8181020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{21529}}^1$

素因数の和:21557

約数の個数: 24

約数和(自身を含む): 18085200

約数和(自身を除く): 9904180

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 21529, 43058, 86116, 107645, 215290, 409051, 430580, 818102, 1636204, 2045255, 4090510, 8181020]

約数ペア:

[(1, 8181020), (2, 4090510), (4, 2045255), (5, 1636204), (10, 818102), (19, 430580), (20, 409051), (38, 215290), (76, 107645), (95, 86116), (190, 43058), (380, 21529)]