GCF for 60 and 645

What is the Greatest common Divisor of 60 and 645?

Answer: GCF of 60 and 645 is 15

(Fifteen)

Finding GCF for 60 and 645 using all factors (divisors) listing

The first method to find GCF for numbers 60 and 645 is to list all factors for both numbers and pick the highest common one:

All factors of 60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60

All factors of 645: 1, 3, 5, 15, 43, 129, 215, 645

So the Greatest Common Factor for 60 and 645 is 15

Finding GCF for 60 and 645 by Prime Factorization

The second method to find GCF for numbers 60 and 645 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 60: 2, 2, 3, 5

All Prime Factors of 645: 3, 5, 43

As we can see there are Prime Factors common to both numbers: 3, 5

Now we need to multiply them to find GCF: 3 × 5 = 15

GCF Table

Number 1Number 2GCF
4564515
466451
476451
486453
496451
506455
516453
526451
536451
546453
556455
566451
576453
586451
596451
6064515
616451
626451
636453
646451
656455
666453
676451
686451
696453
706455
716451
726453
736451
746451

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 Divisor of 60 and 645? (The answer is: 15). Select the first number (e.g. '60') and the second number (e.g. '645'). 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 Divisor of 60 and 645?

GCF of 60 and 645 is 15