21087969

素因数分解:

$3^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{7907}}^1$

素因数の和:8044

約数の個数: 16

約数和(自身を含む): 32391168

約数和(自身を除く): 11303199

約数列:

[1, 3, 7, 21, 127, 381, 889, 2667, 7907, 23721, 55349, 166047, 1004189, 3012567, 7029323, 21087969]

約数ペア:

[(1, 21087969), (3, 7029323), (7, 3012567), (21, 1004189), (127, 166047), (381, 55349), (889, 23721), (2667, 7907)]