19813900

素因数分解:

$2^2\times 5^2\times {\mathrm{198139}}^1$

素因数の和:198153

約数の個数: 18

約数和(自身を含む): 42996380

約数和(自身を除く): 23182480

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 198139, 396278, 792556, 990695, 1981390, 3962780, 4953475, 9906950, 19813900]

約数ペア:

[(1, 19813900), (2, 9906950), (4, 4953475), (5, 3962780), (10, 1981390), (20, 990695), (25, 792556), (50, 396278), (100, 198139)]