18986607

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{691}}^1$

素因数の和:811

約数の個数: 24

約数和(自身を含む): 28499328

約数和(自身を除く): 9512721

約数列:

[1, 3, 9, 43, 71, 129, 213, 387, 639, 691, 2073, 3053, 6219, 9159, 27477, 29713, 49061, 89139, 147183, 267417, 441549, 2109623, 6328869, 18986607]

約数ペア:

[(1, 18986607), (3, 6328869), (9, 2109623), (43, 441549), (71, 267417), (129, 147183), (213, 89139), (387, 49061), (639, 29713), (691, 27477), (2073, 9159), (3053, 6219)]