What is the Greatest Common Factor of 21521 and 21535?

Greatest common factor (GCF) of 21521 and 21535 is 1.

GCF(21521,21535) = 1

We will now calculate the prime factors of 21521 and 21535, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21521 and 21535.

How to find the GCF of 21521 and 21535?

We will first find the prime factorization of 21521 and 21535. After we will calculate the factors of 21521 and 21535 and find the biggest common factor number .

Step-1: Prime Factorization of 21521

Prime factors of 21521 are 21521. Prime factorization of 21521 in exponential form is:

21521 = 21521¹

Step-2: 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-3: Factors of 21521

List of positive integer factors of 21521 that divides 21521 without a remainder.

Step-4: Factors of 21535

List of positive integer factors of 21535 that divides 21521 without a remainder.

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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21521 and 21535. The biggest common factor number is the GCF number.
So the greatest common factor 21521 and 21535 is 1.

Also check out the Least Common Multiple of 21521 and 21535