20487985

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{30809}}^1$

素因数の和:30840

約数の個数: 16

約数和(自身を含む): 29577600

約数和(自身を除く): 9089615

約数列:

[1, 5, 7, 19, 35, 95, 133, 665, 30809, 154045, 215663, 585371, 1078315, 2926855, 4097597, 20487985]

約数ペア:

[(1, 20487985), (5, 4097597), (7, 2926855), (19, 1078315), (35, 585371), (95, 215663), (133, 154045), (665, 30809)]