18779887

素因数分解:

$7^2\times {\mathrm{61}}^2\times {\mathrm{103}}^1$

素因数の和:239

約数の個数: 18

約数和(自身を含む): 22425624

約数和(自身を除く): 3645737

約数列:

[1, 7, 49, 61, 103, 427, 721, 2989, 3721, 5047, 6283, 26047, 43981, 182329, 307867, 383263, 2682841, 18779887]

約数ペア:

[(1, 18779887), (7, 2682841), (49, 383263), (61, 307867), (103, 182329), (427, 43981), (721, 26047), (2989, 6283), (3721, 5047)]