GCF for 20 and 775

What is the Greatest common Divisor of 20 and 775?

Answer: GCF of 20 and 775 is 5

(Five)

Finding GCF for 20 and 775 using all factors (divisors) listing

The first method to find GCF for numbers 20 and 775 is to list all factors for both numbers and pick the highest common one:

All factors of 20: 1, 2, 4, 5, 10, 20

All factors of 775: 1, 5, 25, 31, 155, 775

So the Greatest Common Factor for 20 and 775 is 5

Finding GCF for 20 and 775 by Prime Factorization

The second method to find GCF for numbers 20 and 775 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 20: 2, 2, 5

All Prime Factors of 775: 5, 5, 31

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 20 and 775

GCF Table

Number 1Number 2GCF
57755
67751
77751
87751
97751
107755
117751
127751
137751
147751
157755
167751
177751
187751
197751
207755
217751
227751
237751
247751
2577525
267751
277751
287751
297751
307755
3177531
327751
337751
347751

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 20 and 775? (The answer is: 5). Select the first number (e.g. '20') and the second number (e.g. '775'). 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 20 and 775?

GCF of 20 and 775 is 5