GCF for 70 and 820

What is the Greatest Common Factor of 70 and 820?

Answer: GCF of 70 and 820 is 10

(Ten)

Finding GCF for 70 and 820 using all factors (divisors) listing

The first method to find GCF for numbers 70 and 820 is to list all factors for both numbers and pick the highest common one:

All factors of 70: 1, 2, 5, 7, 10, 14, 35, 70

All factors of 820: 1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820

So the Greatest Common Factor for 70 and 820 is 10

Finding GCF for 70 and 820 by Prime Factorization

The second method to find GCF for numbers 70 and 820 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 70: 2, 5, 7

All Prime Factors of 820: 2, 2, 5, 41

As we can see there are Prime Factors common to both numbers: 2, 5

Now we need to multiply them to find GCF: 2 × 5 = 10

GCF Table

Number 1Number 2GCF
558205
568204
578201
588202
598201
6082020
618201
628202
638201
648204
658205
668202
678201
688204
698201
7082010
718201
728204
738201
748202
758205
768204
778201
788202
798201
8082020
818201
8282082
838201
848204

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 70 and 820? (The answer is: 10). Select the first number (e.g. '70') and the second number (e.g. '820'). 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 70 and 820?

GCF of 70 and 820 is 10