21009969

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{21031}}^1$

素因数の和:21077

約数の個数: 16

約数和(自身を含む): 31968640

約数和(自身を除く): 10958671

約数列:

[1, 3, 9, 27, 37, 111, 333, 999, 21031, 63093, 189279, 567837, 778147, 2334441, 7003323, 21009969]

約数ペア:

[(1, 21009969), (3, 7003323), (9, 2334441), (27, 778147), (37, 567837), (111, 189279), (333, 63093), (999, 21031)]