GCF for 70 and 770

What is the Greatest Common Factor of 70 and 770?

Answer: GCF of 70 and 770 is 70

(Seventy)

Finding GCF for 70 and 770 using all factors (divisors) listing

The first method to find GCF for numbers 70 and 770 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 770: 1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 154, 385, 770

So the Greatest Common Factor for 70 and 770 is 70

Finding GCF for 70 and 770 by Prime Factorization

The second method to find GCF for numbers 70 and 770 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 770: 2, 5, 7, 11

As we can see there are Prime Factors common to both numbers: 2, 5, 7

Now we need to multiply them to find GCF: 2 × 5 × 7 = 70

GCF Table

Number 1Number 2GCF
5577055
5677014
577701
587702
597701
6077010
617701
627702
637707
647702
657705
6677022
677701
687702
697701
7077070
717701
727702
737701
747702
757705
767702
7777077
787702
797701
8077010
817701
827702
837701
8477014

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 770? (The answer is: 70). Select the first number (e.g. '70') and the second number (e.g. '770'). 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 770?

GCF of 70 and 770 is 70