21070989

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{18149}}^1$

素因数の和:18201

約数の個数: 16

約数和(自身を含む): 31944000

約数和(自身を除く): 10873011

約数列:

[1, 3, 9, 27, 43, 129, 387, 1161, 18149, 54447, 163341, 490023, 780407, 2341221, 7023663, 21070989]

約数ペア:

[(1, 21070989), (3, 7023663), (9, 2341221), (27, 780407), (43, 490023), (129, 163341), (387, 54447), (1161, 18149)]