What is the Greatest Common Factor of 21535 and 21553?

Greatest common factor (GCF) of 21535 and 21553 is 1.

GCF(21535,21553) = 1

We will now calculate the prime factors of 21535 and 21553, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21535 and 21553.

How to find the GCF of 21535 and 21553?

We will first find the prime factorization of 21535 and 21553. After we will calculate the factors of 21535 and 21553 and find the biggest common factor number .

Step-1: Prime Factorization of 21535

Prime factors of 21535 are 5, 59, 73. Prime factorization of 21535 in exponential form is:

21535 = 5¹ × 59¹ × 73¹

Step-2: Prime Factorization of 21553

Prime factors of 21553 are 7, 3079. Prime factorization of 21553 in exponential form is:

21553 = 7¹ × 3079¹

Step-3: Factors of 21535

List of positive integer factors of 21535 that divides 21535 without a remainder.

1, 5, 59, 73, 295, 365, 4307

Step-4: Factors of 21553

List of positive integer factors of 21553 that divides 21535 without a remainder.

1, 7, 3079

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21535 and 21553. The biggest common factor number is the GCF number.
So the greatest common factor 21535 and 21553 is 1.

Also check out the Least Common Multiple of 21535 and 21553