What is the Greatest Common Factor of 21057 and 21063?

Greatest common factor (GCF) of 21057 and 21063 is 3.

GCF(21057,21063) = 3

We will now calculate the prime factors of 21057 and 21063, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21057 and 21063.

How to find the GCF of 21057 and 21063?

We will first find the prime factorization of 21057 and 21063. After we will calculate the factors of 21057 and 21063 and find the biggest common factor number .

Step-1: Prime Factorization of 21057

Prime factors of 21057 are 3, 7019. Prime factorization of 21057 in exponential form is:

21057 = 3¹ × 7019¹

Step-2: Prime Factorization of 21063

Prime factors of 21063 are 3, 7, 17, 59. Prime factorization of 21063 in exponential form is:

21063 = 3¹ × 7¹ × 17¹ × 59¹

Step-3: Factors of 21057

List of positive integer factors of 21057 that divides 21057 without a remainder.

1, 3, 7019

Step-4: Factors of 21063

List of positive integer factors of 21063 that divides 21057 without a remainder.

1, 3, 7, 17, 21, 51, 59, 119, 177, 357, 413, 1003, 1239, 3009, 7021

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21057 and 21063. The biggest common factor number is the GCF number.
So the greatest common factor 21057 and 21063 is 3.

Also check out the Least Common Multiple of 21057 and 21063