18172521

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{28439}}^1$

素因数の和:28516

約数の個数: 12

約数和(自身を含む): 26619840

約数和(自身を除く): 8447319

約数列:

[1, 3, 9, 71, 213, 639, 28439, 85317, 255951, 2019169, 6057507, 18172521]

約数ペア:

[(1, 18172521), (3, 6057507), (9, 2019169), (71, 255951), (213, 85317), (639, 28439)]