21264.0000000

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{809}}^1$

素因数の和:912

約数の個数: 16

約数和(自身を含む): 8398080

約数和(自身を除く): 2352423

約数列:

[1, 3, 47, 53, 141, 159, 809, 2427, 2491, 7473, 38023, 42877, 114069, 128631, 2015219, 6045657]

約数ペア:

[(1, 6045657), (3, 2015219), (47, 128631), (53, 114069), (141, 42877), (159, 38023), (809, 7473), (2427, 2491)]