21085287

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{3793}}^1$

素因数の和:3922

約数の個数: 16

約数和(自身を含む): 30048480

約数和(自身を除く): 8963193

約数列:

[1, 3, 17, 51, 109, 327, 1853, 3793, 5559, 11379, 64481, 193443, 413437, 1240311, 7028429, 21085287]

約数ペア:

[(1, 21085287), (3, 7028429), (17, 1240311), (51, 413437), (109, 193443), (327, 64481), (1853, 11379), (3793, 5559)]