19903900

素因数分解:

$2^2\times 5^2\times {\mathrm{199039}}^1$

素因数の和:199053

約数の個数: 18

約数和(自身を含む): 43191680

約数和(自身を除く): 23287780

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 199039, 398078, 796156, 995195, 1990390, 3980780, 4975975, 9951950, 19903900]

約数ペア:

[(1, 19903900), (2, 9951950), (4, 4975975), (5, 3980780), (10, 1990390), (20, 995195), (25, 796156), (50, 398078), (100, 199039)]