What is the Greatest Common Factor of 21165 and 21177?

Greatest common factor (GCF) of 21165 and 21177 is 3.

GCF(21165,21177) = 3

We will now calculate the prime factors of 21165 and 21177, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21165 and 21177.

How to find the GCF of 21165 and 21177?

We will first find the prime factorization of 21165 and 21177. After we will calculate the factors of 21165 and 21177 and find the biggest common factor number .

Step-1: Prime Factorization of 21165

Prime factors of 21165 are 3, 5, 17, 83. Prime factorization of 21165 in exponential form is:

21165 = 3¹ × 5¹ × 17¹ × 83¹

Step-2: Prime Factorization of 21177

Prime factors of 21177 are 3, 13, 181. Prime factorization of 21177 in exponential form is:

21177 = 3² × 13¹ × 181¹

Step-3: Factors of 21165

List of positive integer factors of 21165 that divides 21165 without a remainder.

1, 3, 5, 15, 17, 51, 83, 85, 249, 255, 415, 1245, 1411, 4233, 7055

Step-4: Factors of 21177

List of positive integer factors of 21177 that divides 21165 without a remainder.

1, 3, 9, 13, 39, 117, 181, 543, 1629, 2353, 7059

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21165 and 21177. The biggest common factor number is the GCF number.
So the greatest common factor 21165 and 21177 is 3.

Also check out the Least Common Multiple of 21165 and 21177