What is the Greatest Common Factor of 21947 and 21955?

Greatest common factor (GCF) of 21947 and 21955 is 1.

GCF(21947,21955) = 1

We will now calculate the prime factors of 21947 and 21955, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21947 and 21955.

How to find the GCF of 21947 and 21955?

We will first find the prime factorization of 21947 and 21955. After we will calculate the factors of 21947 and 21955 and find the biggest common factor number .

Step-1: Prime Factorization of 21947

Prime factors of 21947 are 17, 1291. Prime factorization of 21947 in exponential form is:

21947 = 17¹ × 1291¹

Step-2: Prime Factorization of 21955

Prime factors of 21955 are 5, 4391. Prime factorization of 21955 in exponential form is:

21955 = 5¹ × 4391¹

Step-3: Factors of 21947

List of positive integer factors of 21947 that divides 21947 without a remainder.

1, 17, 1291

Step-4: Factors of 21955

List of positive integer factors of 21955 that divides 21947 without a remainder.

1, 5, 4391

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21947 and 21955. The biggest common factor number is the GCF number.
So the greatest common factor 21947 and 21955 is 1.

Also check out the Least Common Multiple of 21947 and 21955