What is the Greatest Common Factor of 21924 and 21942?

Greatest common factor (GCF) of 21924 and 21942 is 18.

GCF(21924,21942) = 18

We will now calculate the prime factors of 21924 and 21942, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21924 and 21942.

How to find the GCF of 21924 and 21942?

We will first find the prime factorization of 21924 and 21942. After we will calculate the factors of 21924 and 21942 and find the biggest common factor number .

Step-1: Prime Factorization of 21924

Prime factors of 21924 are 2, 3, 7, 29. Prime factorization of 21924 in exponential form is:

21924 = 2² × 3³ × 7¹ × 29¹

Step-2: Prime Factorization of 21942

Prime factors of 21942 are 2, 3, 23, 53. Prime factorization of 21942 in exponential form is:

21942 = 2¹ × 3² × 23¹ × 53¹

Step-3: Factors of 21924

List of positive integer factors of 21924 that divides 21924 without a remainder.

1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 29, 36, 42, 54, 58, 63, 84, 87, 108, 116, 126, 174, 189, 203, 252, 261, 348, 378, 406, 522, 609, 756, 783, 812, 1044, 1218, 1566, 1827, 2436, 3132, 3654, 5481, 7308, 10962

Step-4: Factors of 21942

List of positive integer factors of 21942 that divides 21924 without a remainder.

1, 2, 3, 6, 9, 18, 23, 46, 53, 69, 106, 138, 159, 207, 318, 414, 477, 954, 1219, 2438, 3657, 7314, 10971

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 21924 and 21942. The biggest common factor number is the GCF number.
So the greatest common factor 21924 and 21942 is 18.

Also check out the Least Common Multiple of 21924 and 21942