GCF for 20 and 835

What is the Greatest Common Factor of 20 and 835?

Answer: GCF of 20 and 835 is 5

(Five)

Finding GCF for 20 and 835 using all factors (divisors) listing

The first method to find GCF for numbers 20 and 835 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 835: 1, 5, 167, 835

So the Greatest Common Factor for 20 and 835 is 5

Finding GCF for 20 and 835 by Prime Factorization

The second method to find GCF for numbers 20 and 835 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 835: 5, 167

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 835

GCF Table

Number 1Number 2GCF
58355
68351
78351
88351
98351
108355
118351
128351
138351
148351
158355
168351
178351
188351
198351
208355
218351
228351
238351
248351
258355
268351
278351
288351
298351
308355
318351
328351
338351
348351

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 20 and 835? (The answer is: 5). Select the first number (e.g. '20') and the second number (e.g. '835'). 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 20 and 835?

GCF of 20 and 835 is 5