21916.0000000

素因数分解:

$3^4\times 7^1\times {\mathrm{9769}}^1$

素因数の和:9788

約数の個数: 20

約数和(自身を含む): 9457360

約数和(自身を除く): 3918337

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 9769, 29307, 68383, 87921, 205149, 263763, 615447, 791289, 1846341, 5539023]

約数ペア:

[(1, 5539023), (3, 1846341), (7, 791289), (9, 615447), (21, 263763), (27, 205149), (63, 87921), (81, 68383), (189, 29307), (567, 9769)]