20487957

素因数分解:

$3^1\times 7^1\times {\mathrm{491}}^1\times {\mathrm{1987}}^1$

素因数の和:2488

約数の個数: 16

約数和(自身を含む): 31299072

約数和(自身を除く): 10811115

約数列:

[1, 3, 7, 21, 491, 1473, 1987, 3437, 5961, 10311, 13909, 41727, 975617, 2926851, 6829319, 20487957]

約数ペア:

[(1, 20487957), (3, 6829319), (7, 2926851), (21, 975617), (491, 41727), (1473, 13909), (1987, 10311), (3437, 5961)]