GCF for 80 and 245

What is the Greatest Common Factor of 80 and 245?

Answer: GCF of 80 and 245 is 5

(Five)

Finding GCF for 80 and 245 using all factors (divisors) listing

The first method to find GCF for numbers 80 and 245 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 245: 1, 5, 7, 35, 49, 245

So the Greatest Common Factor for 80 and 245 is 5

Finding GCF for 80 and 245 by Prime Factorization

The second method to find GCF for numbers 80 and 245 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 245: 5, 7, 7

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 245

GCF Table

Number 1Number 2GCF
652455
662451
672451
682451
692451
7024535
712451
722451
732451
742451
752455
762451
772457
782451
792451
802455
812451
822451
832451
842457
852455
862451
872451
882451
892451
902455
912457
922451
932451
942451

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 245? (The answer is: 5). Select the first number (e.g. '80') and the second number (e.g. '245'). 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 245?

GCF of 80 and 245 is 5