21138759

素因数分解:

$3^3\times {\mathrm{71}}^1\times {\mathrm{11027}}^1$

素因数の和:11107

約数の個数: 16

約数和(自身を含む): 31760640

約数和(自身を除く): 10621881

約数列:

[1, 3, 9, 27, 71, 213, 639, 1917, 11027, 33081, 99243, 297729, 782917, 2348751, 7046253, 21138759]

約数ペア:

[(1, 21138759), (3, 7046253), (9, 2348751), (27, 782917), (71, 297729), (213, 99243), (639, 33081), (1917, 11027)]