GCF for 70 and 685

What is the Greatest Common Factor of 70 and 685?

Answer: GCF of 70 and 685 is 5

(Five)

Finding GCF for 70 and 685 using all factors (divisors) listing

The first method to find GCF for numbers 70 and 685 is to list all factors for both numbers and pick the highest common one:

All factors of 70: 1, 2, 5, 7, 10, 14, 35, 70

All factors of 685: 1, 5, 137, 685

So the Greatest Common Factor for 70 and 685 is 5

Finding GCF for 70 and 685 by Prime Factorization

The second method to find GCF for numbers 70 and 685 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 70: 2, 5, 7

All Prime Factors of 685: 5, 137

As we can see there is only one Prime Factor common to both numbers. It is 5

So 5 is the Greatest Common Factor of 70 and 685

GCF Table

Number 1Number 2GCF
556855
566851
576851
586851
596851
606855
616851
626851
636851
646851
656855
666851
676851
686851
696851
706855
716851
726851
736851
746851
756855
766851
776851
786851
796851
806855
816851
826851
836851
846851

About "Greatest Common Factor" Calculator

This calculator will help you find the greatest common factor (GCF) of two numbers. For example, it can help you find out what is the Greatest Common Factor of 70 and 685? (The answer is: 5). Select the first number (e.g. '70') and the second number (e.g. '685'). After that hit the 'Calculate' button.
Greatest Common Factor (GCF) also known as the Greatest Common Divisor (GCD) or Highest Common Factor (HCF) - it is the largest positive integer that divides each of the integers with zero remainder

FAQ

What is the Greatest Common Factor of 70 and 685?

GCF of 70 and 685 is 5