81993475

素因数分解:

$5^2\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{857}}^1$

素因数の和:999

約数の個数: 24

約数和(自身を含む): 105328080

約数和(自身を除く): 23334605

約数列:

[1, 5, 25, 43, 89, 215, 445, 857, 1075, 2225, 3827, 4285, 19135, 21425, 36851, 76273, 95675, 184255, 381365, 921275, 1906825, 3279739, 16398695, 81993475]

約数ペア:

[(1, 81993475), (5, 16398695), (25, 3279739), (43, 1906825), (89, 921275), (215, 381365), (445, 184255), (857, 95675), (1075, 76273), (2225, 36851), (3827, 21425), (4285, 19135)]