998500

素因数分解:

$2^2\times 5^3\times {\mathrm{1997}}^1$

素因数の和:2016

約数の個数: 24

約数和(自身を含む): 2181816

約数和(自身を除く): 1183316

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 1997, 3994, 7988, 9985, 19970, 39940, 49925, 99850, 199700, 249625, 499250, 998500]

約数ペア:

[(1, 998500), (2, 499250), (4, 249625), (5, 199700), (10, 99850), (20, 49925), (25, 39940), (50, 19970), (100, 9985), (125, 7988), (250, 3994), (500, 1997)]