19996120

素因数分解:

$2^3\times 5^1\times {\mathrm{499903}}^1$

素因数の和:499914

約数の個数: 16

約数和(自身を含む): 44991360

約数和(自身を除く): 24995240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499903, 999806, 1999612, 2499515, 3999224, 4999030, 9998060, 19996120]

約数ペア:

[(1, 19996120), (2, 9998060), (4, 4999030), (5, 3999224), (8, 2499515), (10, 1999612), (20, 999806), (40, 499903)]