21008091

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{28351}}^1$

素因数の和:28386

約数の個数: 16

約数和(自身を含む): 31754240

約数和(自身を除く): 10746149

約数列:

[1, 3, 13, 19, 39, 57, 247, 741, 28351, 85053, 368563, 538669, 1105689, 1616007, 7002697, 21008091]

約数ペア:

[(1, 21008091), (3, 7002697), (13, 1616007), (19, 1105689), (39, 538669), (57, 368563), (247, 85053), (741, 28351)]