What is the Greatest Common Factor of 21563 and 21575?

Greatest common factor (GCF) of 21563 and 21575 is 1.

GCF(21563,21575) = 1

We will now calculate the prime factors of 21563 and 21575, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21563 and 21575.

How to find the GCF of 21563 and 21575?

We will first find the prime factorization of 21563 and 21575. After we will calculate the factors of 21563 and 21575 and find the biggest common factor number .

Step-1: Prime Factorization of 21563

Prime factors of 21563 are 21563. Prime factorization of 21563 in exponential form is:

21563 = 21563¹

Step-2: Prime Factorization of 21575

Prime factors of 21575 are 5, 863. Prime factorization of 21575 in exponential form is:

21575 = 5² × 863¹

Step-3: Factors of 21563

List of positive integer factors of 21563 that divides 21563 without a remainder.

Step-4: Factors of 21575

List of positive integer factors of 21575 that divides 21563 without a remainder.

1, 5, 25, 863, 4315

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21563 and 21575. The biggest common factor number is the GCF number.
So the greatest common factor 21563 and 21575 is 1.

Also check out the Least Common Multiple of 21563 and 21575