19838990

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{22291}}^1$

素因数の和:22387

約数の個数: 16

約数和(自身を含む): 36113040

約数和(自身を除く): 16274050

約数列:

[1, 2, 5, 10, 89, 178, 445, 890, 22291, 44582, 111455, 222910, 1983899, 3967798, 9919495, 19838990]

約数ペア:

[(1, 19838990), (2, 9919495), (5, 3967798), (10, 1983899), (89, 222910), (178, 111455), (445, 44582), (890, 22291)]