28013121

素因数分解:

$3^4\times {\mathrm{71}}^1\times {\mathrm{4871}}^1$

素因数の和:4954

約数の個数: 20

約数和(自身を含む): 42444864

約数和(自身を除く): 14431743

約数列:

[1, 3, 9, 27, 71, 81, 213, 639, 1917, 4871, 5751, 14613, 43839, 131517, 345841, 394551, 1037523, 3112569, 9337707, 28013121]

約数ペア:

[(1, 28013121), (3, 9337707), (9, 3112569), (27, 1037523), (71, 394551), (81, 345841), (213, 131517), (639, 43839), (1917, 14613), (4871, 5751)]