The GCD of given numbers is 19.
factors of 380 are : | 1 , 2 , 4 , 5 , 10 , 19 , 20 , 38 , 76 , 95 , 190 , 380 |
factors of 171 are : | 1 , 3 , 9 , 19 , 57 , 171 |
We see that the Greatest Common Factor = 19.
This solution can be visualized using a Venn diagram.
The GCD equals the product of the numbers at the intersection.