What is the Greatest Common Factor of 21015 and 21035?

Greatest common factor (GCF) of 21015 and 21035 is 5.

GCF(21015,21035) = 5

We will now calculate the prime factors of 21015 and 21035, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21015 and 21035.

How to find the GCF of 21015 and 21035?

We will first find the prime factorization of 21015 and 21035. After we will calculate the factors of 21015 and 21035 and find the biggest common factor number .

Step-1: Prime Factorization of 21015

Prime factors of 21015 are 3, 5, 467. Prime factorization of 21015 in exponential form is:

21015 = 3² × 5¹ × 467¹

Step-2: Prime Factorization of 21035

Prime factors of 21035 are 5, 7, 601. Prime factorization of 21035 in exponential form is:

21035 = 5¹ × 7¹ × 601¹

Step-3: Factors of 21015

List of positive integer factors of 21015 that divides 21015 without a remainder.

1, 3, 5, 9, 15, 45, 467, 1401, 2335, 4203, 7005

Step-4: Factors of 21035

List of positive integer factors of 21035 that divides 21015 without a remainder.

1, 5, 7, 35, 601, 3005, 4207

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21015 and 21035. The biggest common factor number is the GCF number.
So the greatest common factor 21015 and 21035 is 5.

Also check out the Least Common Multiple of 21015 and 21035