18708885

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31981}}^1$

素因数の和:32005

約数の個数: 24

約数和(自身を含む): 34924344

約数和(自身を除く): 16215459

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 195, 585, 31981, 95943, 159905, 287829, 415753, 479715, 1247259, 1439145, 2078765, 3741777, 6236295, 18708885]

約数ペア:

[(1, 18708885), (3, 6236295), (5, 3741777), (9, 2078765), (13, 1439145), (15, 1247259), (39, 479715), (45, 415753), (65, 287829), (117, 159905), (195, 95943), (585, 31981)]