18960560

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2663}}^1$

素因数の和:2765

約数の個数: 40

約数和(自身を含む): 44595360

約数和(自身を除く): 25634800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2663, 3560, 5326, 7120, 10652, 13315, 21304, 26630, 42608, 53260, 106520, 213040, 237007, 474014, 948028, 1185035, 1896056, 2370070, 3792112, 4740140, 9480280, 18960560]

約数ペア:

[(1, 18960560), (2, 9480280), (4, 4740140), (5, 3792112), (8, 2370070), (10, 1896056), (16, 1185035), (20, 948028), (40, 474014), (80, 237007), (89, 213040), (178, 106520), (356, 53260), (445, 42608), (712, 26630), (890, 21304), (1424, 13315), (1780, 10652), (2663, 7120), (3560, 5326)]