19928900

素因数分解:

$2^2\times 5^2\times {\mathrm{199289}}^1$

素因数の和:199303

約数の個数: 18

約数和(自身を含む): 43245930

約数和(自身を除く): 23317030

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 199289, 398578, 797156, 996445, 1992890, 3985780, 4982225, 9964450, 19928900]

約数ペア:

[(1, 19928900), (2, 9964450), (4, 4982225), (5, 3985780), (10, 1992890), (20, 996445), (25, 797156), (50, 398578), (100, 199289)]