21279705

素因数分解:

$3^1\times 5^1\times {\mathrm{307}}^1\times {\mathrm{4621}}^1$

素因数の和:4936

約数の個数: 16

約数和(自身を含む): 34165824

約数和(自身を除く): 12886119

約数列:

[1, 3, 5, 15, 307, 921, 1535, 4605, 4621, 13863, 23105, 69315, 1418647, 4255941, 7093235, 21279705]

約数ペア:

[(1, 21279705), (3, 7093235), (5, 4255941), (15, 1418647), (307, 69315), (921, 23105), (1535, 13863), (4605, 4621)]