# What is the Greatest Common Factor of 49 and 57?

Greatest common factor (GCF) of 49 and 57 is 1.

GCF(49,57) = 1

We will now calculate the prime factors of 49 and 57, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 49 and 57.

GCF Calculator and
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## How to find the GCF of 49 and 57?

We will first find the prime factorization of 49 and 57. After we will calculate the factors of 49 and 57 and find the biggest common factor number .

### Step-1: Prime Factorization of 49

Prime factors of 49 are 7. Prime factorization of 49 in exponential form is:

49 = 72

### Step-2: Prime Factorization of 57

Prime factors of 57 are 3, 19. Prime factorization of 57 in exponential form is:

57 = 31 × 191

### Step-3: Factors of 49

List of positive integer factors of 49 that divides 49 without a remainder.

1, 7

### Step-4: Factors of 57

List of positive integer factors of 57 that divides 49 without a remainder.

1, 3, 19

#### Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 49 and 57. The biggest common factor number is the GCF number.
So the greatest common factor 49 and 57 is 1.

Also check out the Least Common Multiple of 49 and 57