What is the Greatest Common Factor of 42020 and 42028?

Greatest common factor (GCF) of 42020 and 42028 is 4.

GCF(42020,42028) = 4

We will now calculate the prime factors of 42020 and 42028, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42020 and 42028.

How to find the GCF of 42020 and 42028?

We will first find the prime factorization of 42020 and 42028. After we will calculate the factors of 42020 and 42028 and find the biggest common factor number .

Step-1: Prime Factorization of 42020

Prime factors of 42020 are 2, 5, 11, 191. Prime factorization of 42020 in exponential form is:

42020 = 2² × 5¹ × 11¹ × 191¹

Step-2: Prime Factorization of 42028

Prime factors of 42028 are 2, 7, 19, 79. Prime factorization of 42028 in exponential form is:

42028 = 2² × 7¹ × 19¹ × 79¹

Step-3: Factors of 42020

List of positive integer factors of 42020 that divides 42020 without a remainder.

1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 191, 220, 382, 764, 955, 1910, 2101, 3820, 4202, 8404, 10505, 21010

Step-4: Factors of 42028

List of positive integer factors of 42028 that divides 42020 without a remainder.

1, 2, 4, 7, 14, 19, 28, 38, 76, 79, 133, 158, 266, 316, 532, 553, 1106, 1501, 2212, 3002, 6004, 10507, 21014

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42020 and 42028. The biggest common factor number is the GCF number.
So the greatest common factor 42020 and 42028 is 4.

Also check out the Least Common Multiple of 42020 and 42028