GCF for 70 and 85

What is the Greatest Common Factor of 70 and 85?

Answer: GCF of 70 and 85 is 5

(Five)

Finding GCF for 70 and 85 using all factors (divisors) listing

The first method to find GCF for numbers 70 and 85 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 85: 1, 5, 17, 85

So the Greatest Common Factor for 70 and 85 is 5

Finding GCF for 70 and 85 by Prime Factorization

The second method to find GCF for numbers 70 and 85 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 85: 5, 17

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 70 and 85

GCF Table

Number 1Number 2GCF
55855
56851
57851
58851
59851
6085
61851
62851
63851
64851
65855
66851
67851
6885
69851
70855
71851
72851
73851
74851
75855
76851
77851
78851
79851
80855
81851
82851
83851
84851

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 85? (The answer is: 5). Select the first number (e.g. '70') and the second number (e.g. '85'). 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 85?

GCF of 70 and 85 is 5