81425617

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{20809}}^1$

素因数の和:20872

約数の個数: 16

約数和(自身を含む): 102551680

約数和(自身を除く): 21126063

約数列:

[1, 7, 13, 43, 91, 301, 559, 3913, 20809, 145663, 270517, 894787, 1893619, 6263509, 11632231, 81425617]

約数ペア:

[(1, 81425617), (7, 11632231), (13, 6263509), (43, 1893619), (91, 894787), (301, 270517), (559, 145663), (3913, 20809)]