What is the greatest common factor of 15 and 35?

We found the factors and prime factorization of 15 and 35. The biggest common factor number is the GCF number. So the greatest common factor 15 and 35 is 5.Click to see full answer. In this regard, whats the greatest common factor of 15 and 35? 5 Similarly, what is the greatest common factor of 35? We found the factors and prime factorization of 35 and 40. The biggest common factor number is the GCF number. So the greatest common factor 35 and 40 is 5. Just so, what is the greatest common factor for 15 and 36? The gcf of 15 and 36 is 3.What’s the greatest common factor of 15 and 30?The gcf of 15 and 30 is 15.