21339983

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{281}}^1\times {\mathrm{571}}^1$

素因数の和:878

約数の個数: 16

約数和(自身を含む): 25808640

約数和(自身を除く): 4468657

約数列:

[1, 7, 19, 133, 281, 571, 1967, 3997, 5339, 10849, 37373, 75943, 160451, 1123157, 3048569, 21339983]

約数ペア:

[(1, 21339983), (7, 3048569), (19, 1123157), (133, 160451), (281, 75943), (571, 37373), (1967, 10849), (3997, 5339)]