# What is the Greatest Common Factor of 156 and 173?

Greatest common factor (GCF) of 156 and 173 is 1.

GCF(156,173) = 1

We will now calculate the prime factors of 156 and 173, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 156 and 173.

GCF Calculator and
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## How to find the GCF of 156 and 173?

We will first find the prime factorization of 156 and 173. After we will calculate the factors of 156 and 173 and find the biggest common factor number .

### Step-1: Prime Factorization of 156

Prime factors of 156 are 2, 3, 13. Prime factorization of 156 in exponential form is:

156 = 22 × 31 × 131

### Step-2: Prime Factorization of 173

Prime factors of 173 are 173. Prime factorization of 173 in exponential form is:

173 = 1731

### Step-3: Factors of 156

List of positive integer factors of 156 that divides 156 without a remainder.

1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78

### Step-4: Factors of 173

List of positive integer factors of 173 that divides 156 without a remainder.

1

#### Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 156 and 173. The biggest common factor number is the GCF number.
So the greatest common factor 156 and 173 is 1.

Also check out the Least Common Multiple of 156 and 173