19865980

素因数分解:

$2^2\times 5^1\times {\mathrm{373}}^1\times {\mathrm{2663}}^1$

素因数の和:3045

約数の個数: 24

約数和(自身を含む): 41846112

約数和(自身を除く): 21980132

約数列:

[1, 2, 4, 5, 10, 20, 373, 746, 1492, 1865, 2663, 3730, 5326, 7460, 10652, 13315, 26630, 53260, 993299, 1986598, 3973196, 4966495, 9932990, 19865980]

約数ペア:

[(1, 19865980), (2, 9932990), (4, 4966495), (5, 3973196), (10, 1986598), (20, 993299), (373, 53260), (746, 26630), (1492, 13315), (1865, 10652), (2663, 7460), (3730, 5326)]