19985960

素因数分解:

$2^3\times 5^1\times {\mathrm{499649}}^1$

素因数の和:499660

約数の個数: 16

約数和(自身を含む): 44968500

約数和(自身を除く): 24982540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499649, 999298, 1998596, 2498245, 3997192, 4996490, 9992980, 19985960]

約数ペア:

[(1, 19985960), (2, 9992980), (4, 4996490), (5, 3997192), (8, 2498245), (10, 1998596), (20, 999298), (40, 499649)]