28891919

素因数分解:

$7^3\times {\mathrm{131}}^1\times {\mathrm{643}}^1$

素因数の和:795

約数の個数: 16

約数和(自身を含む): 34003200

約数和(自身を除く): 5111281

約数列:

[1, 7, 49, 131, 343, 643, 917, 4501, 6419, 31507, 44933, 84233, 220549, 589631, 4127417, 28891919]

約数ペア:

[(1, 28891919), (7, 4127417), (49, 589631), (131, 220549), (343, 84233), (643, 44933), (917, 31507), (4501, 6419)]