What is the Greatest Common Factor of 21024 and 21042?

Greatest common factor (GCF) of 21024 and 21042 is 18.

GCF(21024,21042) = 18

We will now calculate the prime factors of 21024 and 21042, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21024 and 21042.

How to find the GCF of 21024 and 21042?

We will first find the prime factorization of 21024 and 21042. After we will calculate the factors of 21024 and 21042 and find the biggest common factor number .

Step-1: Prime Factorization of 21024

Prime factors of 21024 are 2, 3, 73. Prime factorization of 21024 in exponential form is:

21024 = 2⁵ × 3² × 73¹

Step-2: Prime Factorization of 21042

Prime factors of 21042 are 2, 3, 7, 167. Prime factorization of 21042 in exponential form is:

21042 = 2¹ × 3² × 7¹ × 167¹

Step-3: Factors of 21024

List of positive integer factors of 21024 that divides 21024 without a remainder.

1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 72, 73, 96, 144, 146, 219, 288, 292, 438, 584, 657, 876, 1168, 1314, 1752, 2336, 2628, 3504, 5256, 7008, 10512

Step-4: Factors of 21042

List of positive integer factors of 21042 that divides 21024 without a remainder.

1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 167, 334, 501, 1002, 1169, 1503, 2338, 3006, 3507, 7014, 10521

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21024 and 21042. The biggest common factor number is the GCF number.
So the greatest common factor 21024 and 21042 is 18.

Also check out the Least Common Multiple of 21024 and 21042