What is the Greatest Common Factor of 21987 and 22003?

Greatest common factor (GCF) of 21987 and 22003 is 1.

GCF(21987,22003) = 1

We will now calculate the prime factors of 21987 and 22003, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21987 and 22003.

How to find the GCF of 21987 and 22003?

We will first find the prime factorization of 21987 and 22003. After we will calculate the factors of 21987 and 22003 and find the biggest common factor number .

Step-1: Prime Factorization of 21987

Prime factors of 21987 are 3, 7, 349. Prime factorization of 21987 in exponential form is:

21987 = 3² × 7¹ × 349¹

Step-2: Prime Factorization of 22003

Prime factors of 22003 are 22003. Prime factorization of 22003 in exponential form is:

22003 = 22003¹

Step-3: Factors of 21987

List of positive integer factors of 21987 that divides 21987 without a remainder.

1, 3, 7, 9, 21, 63, 349, 1047, 2443, 3141, 7329

Step-4: Factors of 22003

List of positive integer factors of 22003 that divides 21987 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21987 and 22003. The biggest common factor number is the GCF number.
So the greatest common factor 21987 and 22003 is 1.

Also check out the Least Common Multiple of 21987 and 22003