What is the Greatest Common Factor of 21155 and 21171?

Greatest common factor (GCF) of 21155 and 21171 is 1.

GCF(21155,21171) = 1

We will now calculate the prime factors of 21155 and 21171, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21155 and 21171.

How to find the GCF of 21155 and 21171?

We will first find the prime factorization of 21155 and 21171. After we will calculate the factors of 21155 and 21171 and find the biggest common factor number .

Step-1: Prime Factorization of 21155

Prime factors of 21155 are 5, 4231. Prime factorization of 21155 in exponential form is:

21155 = 5¹ × 4231¹

Step-2: Prime Factorization of 21171

Prime factors of 21171 are 3, 7057. Prime factorization of 21171 in exponential form is:

21171 = 3¹ × 7057¹

Step-3: Factors of 21155

List of positive integer factors of 21155 that divides 21155 without a remainder.

1, 5, 4231

Step-4: Factors of 21171

List of positive integer factors of 21171 that divides 21155 without a remainder.

1, 3, 7057

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21155 and 21171. The biggest common factor number is the GCF number.
So the greatest common factor 21155 and 21171 is 1.

Also check out the Least Common Multiple of 21155 and 21171