20640479

素因数分解:

${\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{103}}^1\times {\mathrm{199}}^1$

素因数の和:374

約数の個数: 16

約数和(自身を含む): 22464000

約数和(自身を除く): 1823521

約数列:

[1, 19, 53, 103, 199, 1007, 1957, 3781, 5459, 10547, 20497, 103721, 200393, 389443, 1086341, 20640479]

約数ペア:

[(1, 20640479), (19, 1086341), (53, 389443), (103, 200393), (199, 103721), (1007, 20497), (1957, 10547), (3781, 5459)]