1981985

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{673}}^1$

素因数の和:728

約数の個数: 16

約数和(自身を含む): 2588160

約数和(自身を除く): 606175

約数列:

[1, 5, 19, 31, 95, 155, 589, 673, 2945, 3365, 12787, 20863, 63935, 104315, 396397, 1981985]

約数ペア:

[(1, 1981985), (5, 396397), (19, 104315), (31, 63935), (95, 20863), (155, 12787), (589, 3365), (673, 2945)]