19948900

素因数分解:

$2^2\times 5^2\times {\mathrm{199489}}^1$

素因数の和:199503

約数の個数: 18

約数和(自身を含む): 43289330

約数和(自身を除く): 23340430

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 199489, 398978, 797956, 997445, 1994890, 3989780, 4987225, 9974450, 19948900]

約数ペア:

[(1, 19948900), (2, 9974450), (4, 4987225), (5, 3989780), (10, 1994890), (20, 997445), (25, 797956), (50, 398978), (100, 199489)]