GCF for 39 and 91

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

What is the Greatest common Divisor of 39 and 91?

Answer: GCF of 39 and 91 is 13

(Thirteen)

Finding GCF for 39 and 91 using all factors (divisors) listing

The first method to find GCF for numbers 39 and 91 is to list all factors for both numbers and pick the highest common one:

All factors of 39: 1, 3, 13, 39

All factors of 91: 1, 7, 13, 91

So the Greatest Common Factor for 39 and 91 is 13

Finding GCF for 39 and 91 by Prime Factorization

The second method to find GCF for numbers 39 and 91 is to list all Prime Factors for both numbers and multiply the common ones:

All Prime Factors of 39: 3, 13

All Prime Factors of 91: 7, 13

As we can see there is only one Prime Factor common to both numbers. It is 13

So 13 is the Greatest Common Factor of 39 and 91

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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 39 and 91? (The answer is: 13). Select the first number (e.g. '39') and the second number (e.g. '91'). 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

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

GCF Table

Number 1Number 2GCF
24911
25911
269113
27911
28917
29911
30911
31911
32911
33911
34911
35917
36911
37911
38911
399113
40911
41911
42917
43911
44911
45911
46911
47911
48911
49917
50911
51911
529113
53911

FAQ

What is the Greatest common Divisor of 39 and 91?

GCF of 39 and 91 is 13

See Also