18420969

素因数分解:

$3^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{6907}}^1$

素因数の和:7044

約数の個数: 16

約数和(自身を含む): 28295168

約数和(自身を除く): 9874199

約数列:

[1, 3, 7, 21, 127, 381, 889, 2667, 6907, 20721, 48349, 145047, 877189, 2631567, 6140323, 18420969]

約数ペア:

[(1, 18420969), (3, 6140323), (7, 2631567), (21, 877189), (127, 145047), (381, 48349), (889, 20721), (2667, 6907)]