81640391

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{439}}^1\times {\mathrm{857}}^1$

素因数の和:1334

約数の個数: 16

約数和(自身を含む): 96645120

約数和(自身を除く): 15004729

約数列:

[1, 7, 31, 217, 439, 857, 3073, 5999, 13609, 26567, 95263, 185969, 376223, 2633561, 11662913, 81640391]

約数ペア:

[(1, 81640391), (7, 11662913), (31, 2633561), (217, 376223), (439, 185969), (857, 95263), (3073, 26567), (5999, 13609)]