19961320

素因数分解:

$2^3\times 5^1\times {\mathrm{499033}}^1$

素因数の和:499044

約数の個数: 16

約数和(自身を含む): 44913060

約数和(自身を除く): 24951740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499033, 998066, 1996132, 2495165, 3992264, 4990330, 9980660, 19961320]

約数ペア:

[(1, 19961320), (2, 9980660), (4, 4990330), (5, 3992264), (8, 2495165), (10, 1996132), (20, 998066), (40, 499033)]