GCF for 80 and 855

What is the Greatest Common Factor of 80 and 855?

Answer: GCF of 80 and 855 is 5

(Five)

Finding GCF for 80 and 855 using all factors (divisors) listing

The first method to find GCF for numbers 80 and 855 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 855: 1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 285, 855

So the Greatest Common Factor for 80 and 855 is 5

Finding GCF for 80 and 855 by Prime Factorization

The second method to find GCF for numbers 80 and 855 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 855: 3, 3, 5, 19

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 855

GCF Table

Number 1Number 2GCF
658555
668553
678551
688551
698553
708555
718551
728559
738551
748551
7585515
7685519
778551
788553
798551
808555
818559
828551
838551
848553
858555
868551
878553
888551
898551
9085545
918551
928551
938553
948551

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 855? (The answer is: 5). Select the first number (e.g. '80') and the second number (e.g. '855'). 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 855?

GCF of 80 and 855 is 5