What is the Greatest Common Factor of 21545 and 21562?

Greatest common factor (GCF) of 21545 and 21562 is 1.

GCF(21545,21562) = 1

We will now calculate the prime factors of 21545 and 21562, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21545 and 21562.

How to find the GCF of 21545 and 21562?

We will first find the prime factorization of 21545 and 21562. After we will calculate the factors of 21545 and 21562 and find the biggest common factor number .

Step-1: Prime Factorization of 21545

Prime factors of 21545 are 5, 31, 139. Prime factorization of 21545 in exponential form is:

21545 = 5¹ × 31¹ × 139¹

Step-2: Prime Factorization of 21562

Prime factors of 21562 are 2, 10781. Prime factorization of 21562 in exponential form is:

21562 = 2¹ × 10781¹

Step-3: Factors of 21545

List of positive integer factors of 21545 that divides 21545 without a remainder.

1, 5, 31, 139, 155, 695, 4309

Step-4: Factors of 21562

List of positive integer factors of 21562 that divides 21545 without a remainder.

1, 2, 10781

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21545 and 21562. The biggest common factor number is the GCF number.
So the greatest common factor 21545 and 21562 is 1.

Also check out the Least Common Multiple of 21545 and 21562