What is the Greatest Common Factor of 21008 and 21015?

Greatest common factor (GCF) of 21008 and 21015 is 1.

GCF(21008,21015) = 1

We will now calculate the prime factors of 21008 and 21015, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21008 and 21015.

How to find the GCF of 21008 and 21015?

We will first find the prime factorization of 21008 and 21015. After we will calculate the factors of 21008 and 21015 and find the biggest common factor number .

Step-1: Prime Factorization of 21008

Prime factors of 21008 are 2, 13, 101. Prime factorization of 21008 in exponential form is:

21008 = 2⁴ × 13¹ × 101¹

Step-2: 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-3: Factors of 21008

List of positive integer factors of 21008 that divides 21008 without a remainder.

1, 2, 4, 8, 13, 16, 26, 52, 101, 104, 202, 208, 404, 808, 1313, 1616, 2626, 5252, 10504

Step-4: Factors of 21015

List of positive integer factors of 21015 that divides 21008 without a remainder.

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

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21008 and 21015. The biggest common factor number is the GCF number.
So the greatest common factor 21008 and 21015 is 1.

Also check out the Least Common Multiple of 21008 and 21015