GCF for 80 and 865

What is the Greatest Common Factor of 80 and 865?

Answer: GCF of 80 and 865 is 5

(Five)

Finding GCF for 80 and 865 using all factors (divisors) listing

The first method to find GCF for numbers 80 and 865 is to list all factors for both numbers and pick the highest common one:

All factors of 80: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

All factors of 865: 1, 5, 173, 865

So the Greatest Common Factor for 80 and 865 is 5

Finding GCF for 80 and 865 by Prime Factorization

The second method to find GCF for numbers 80 and 865 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 80: 2, 2, 2, 2, 5

All Prime Factors of 865: 5, 173

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 80 and 865

GCF Table

Number 1Number 2GCF
658655
668651
678651
688651
698651
708655
718651
728651
738651
748651
758655
768651
778651
788651
798651
808655
818651
828651
838651
848651
858655
868651
878651
888651
898651
908655
918651
928651
938651
948651

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 80 and 865? (The answer is: 5). Select the first number (e.g. '80') and the second number (e.g. '865'). 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 80 and 865?

GCF of 80 and 865 is 5