19904900

素因数分解:

$2^2\times 5^2\times {\mathrm{199049}}^1$

素因数の和:199063

約数の個数: 18

約数和(自身を含む): 43193850

約数和(自身を除く): 23288950

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 199049, 398098, 796196, 995245, 1990490, 3980980, 4976225, 9952450, 19904900]

約数ペア:

[(1, 19904900), (2, 9952450), (4, 4976225), (5, 3980980), (10, 1990490), (20, 995245), (25, 796196), (50, 398098), (100, 199049)]