What is the Greatest Common Factor of 20949 and 20955?

Greatest common factor (GCF) of 20949 and 20955 is 3.

GCF(20949,20955) = 3

We will now calculate the prime factors of 20949 and 20955, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20949 and 20955.

How to find the GCF of 20949 and 20955?

We will first find the prime factorization of 20949 and 20955. After we will calculate the factors of 20949 and 20955 and find the biggest common factor number .

Step-1: Prime Factorization of 20949

Prime factors of 20949 are 3, 6983. Prime factorization of 20949 in exponential form is:

20949 = 3¹ × 6983¹

Step-2: Prime Factorization of 20955

Prime factors of 20955 are 3, 5, 11, 127. Prime factorization of 20955 in exponential form is:

20955 = 3¹ × 5¹ × 11¹ × 127¹

Step-3: Factors of 20949

List of positive integer factors of 20949 that divides 20949 without a remainder.

1, 3, 6983

Step-4: Factors of 20955

List of positive integer factors of 20955 that divides 20949 without a remainder.

1, 3, 5, 11, 15, 33, 55, 127, 165, 381, 635, 1397, 1905, 4191, 6985

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20949 and 20955. The biggest common factor number is the GCF number.
So the greatest common factor 20949 and 20955 is 3.

Also check out the Least Common Multiple of 20949 and 20955