What is the Greatest Common Factor of 2055 and 2070?

Greatest common factor (GCF) of 2055 and 2070 is 15.

GCF(2055,2070) = 15

We will now calculate the prime factors of 2055 and 2070, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 2055 and 2070.

How to find the GCF of 2055 and 2070?

We will first find the prime factorization of 2055 and 2070. After we will calculate the factors of 2055 and 2070 and find the biggest common factor number .

Step-1: Prime Factorization of 2055

Prime factors of 2055 are 3, 5, 137. Prime factorization of 2055 in exponential form is:

2055 = 3¹ × 5¹ × 137¹

Step-2: Prime Factorization of 2070

Prime factors of 2070 are 2, 3, 5, 23. Prime factorization of 2070 in exponential form is:

2070 = 2¹ × 3² × 5¹ × 23¹

Step-3: Factors of 2055

List of positive integer factors of 2055 that divides 2055 without a remainder.

1, 3, 5, 15, 137, 411, 685

Step-4: Factors of 2070

List of positive integer factors of 2070 that divides 2055 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 23, 30, 45, 46, 69, 90, 115, 138, 207, 230, 345, 414, 690, 1035

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 2055 and 2070. The biggest common factor number is the GCF number.
So the greatest common factor 2055 and 2070 is 15.

Also check out the Least Common Multiple of 2055 and 2070