21916521

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{677}}^1$

素因数の和:806

約数の個数: 32

約数和(自身を含む): 35798400

約数和(自身を除く): 13881879

約数列:

[1, 3, 9, 11, 27, 33, 99, 109, 297, 327, 677, 981, 1199, 2031, 2943, 3597, 6093, 7447, 10791, 18279, 22341, 32373, 67023, 73793, 201069, 221379, 664137, 811723, 1992411, 2435169, 7305507, 21916521]

約数ペア:

[(1, 21916521), (3, 7305507), (9, 2435169), (11, 1992411), (27, 811723), (33, 664137), (99, 221379), (109, 201069), (297, 73793), (327, 67023), (677, 32373), (981, 22341), (1199, 18279), (2031, 10791), (2943, 7447), (3597, 6093)]