18719919

素因数分解:

$3^2\times {\mathrm{79}}^1\times {\mathrm{113}}^1\times {\mathrm{233}}^1$

素因数の和:431

約数の個数: 24

約数和(自身を含む): 27743040

約数和(自身を除く): 9023121

約数列:

[1, 3, 9, 79, 113, 233, 237, 339, 699, 711, 1017, 2097, 8927, 18407, 26329, 26781, 55221, 78987, 80343, 165663, 236961, 2079991, 6239973, 18719919]

約数ペア:

[(1, 18719919), (3, 6239973), (9, 2079991), (79, 236961), (113, 165663), (233, 80343), (237, 78987), (339, 55221), (699, 26781), (711, 26329), (1017, 18407), (2097, 8927)]