21267681

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{181}}^1\times {\mathrm{739}}^1$

素因数の和:976

約数の個数: 16

約数和(自身を含む): 29090880

約数和(自身を除く): 7823199

約数列:

[1, 3, 53, 159, 181, 543, 739, 2217, 9593, 28779, 39167, 117501, 133759, 401277, 7089227, 21267681]

約数ペア:

[(1, 21267681), (3, 7089227), (53, 401277), (159, 133759), (181, 117501), (543, 39167), (739, 28779), (2217, 9593)]