18278561

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{643}}^1$

素因数の和:812

約数の個数: 16

約数和(自身を含む): 21762048

約数和(自身を除く): 3483487

約数列:

[1, 7, 31, 131, 217, 643, 917, 4061, 4501, 19933, 28427, 84233, 139531, 589631, 2611223, 18278561]

約数ペア:

[(1, 18278561), (7, 2611223), (31, 589631), (131, 139531), (217, 84233), (643, 28427), (917, 19933), (4061, 4501)]