What is the Greatest Common Factor of 1071 and 1085?

Greatest common factor (GCF) of 1071 and 1085 is 7.

GCF(1071,1085) = 7

We will now calculate the prime factors of 1071 and 1085, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1071 and 1085.

How to find the GCF of 1071 and 1085?

We will first find the prime factorization of 1071 and 1085. After we will calculate the factors of 1071 and 1085 and find the biggest common factor number .

Step-1: Prime Factorization of 1071

Prime factors of 1071 are 3, 7, 17. Prime factorization of 1071 in exponential form is:

1071 = 3² × 7¹ × 17¹

Step-2: Prime Factorization of 1085

Prime factors of 1085 are 5, 7, 31. Prime factorization of 1085 in exponential form is:

1085 = 5¹ × 7¹ × 31¹

Step-3: Factors of 1071

List of positive integer factors of 1071 that divides 1071 without a remainder.

1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357

Step-4: Factors of 1085

List of positive integer factors of 1085 that divides 1071 without a remainder.

1, 5, 7, 31, 35, 155, 217

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1071 and 1085. The biggest common factor number is the GCF number.
So the greatest common factor 1071 and 1085 is 7.

Also check out the Least Common Multiple of 1071 and 1085