19902040

素因数分解:

$2^3\times 5^1\times {\mathrm{497551}}^1$

素因数の和:497562

約数の個数: 16

約数和(自身を含む): 44779680

約数和(自身を除く): 24877640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 497551, 995102, 1990204, 2487755, 3980408, 4975510, 9951020, 19902040]

約数ペア:

[(1, 19902040), (2, 9951020), (4, 4975510), (5, 3980408), (8, 2487755), (10, 1990204), (20, 995102), (40, 497551)]