What is the Greatest Common Factor of 20818 and 20825?

Greatest common factor (GCF) of 20818 and 20825 is 7.

GCF(20818,20825) = 7

We will now calculate the prime factors of 20818 and 20825, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20818 and 20825.

How to find the GCF of 20818 and 20825?

We will first find the prime factorization of 20818 and 20825. After we will calculate the factors of 20818 and 20825 and find the biggest common factor number .

Step-1: Prime Factorization of 20818

Prime factors of 20818 are 2, 7, 1487. Prime factorization of 20818 in exponential form is:

20818 = 2¹ × 7¹ × 1487¹

Step-2: Prime Factorization of 20825

Prime factors of 20825 are 5, 7, 17. Prime factorization of 20825 in exponential form is:

20825 = 5² × 7² × 17¹

Step-3: Factors of 20818

List of positive integer factors of 20818 that divides 20818 without a remainder.

1, 2, 7, 14, 1487, 2974, 10409

Step-4: Factors of 20825

List of positive integer factors of 20825 that divides 20818 without a remainder.

1, 5, 7, 17, 25, 35, 49, 85, 119, 175, 245, 425, 595, 833, 1225, 2975, 4165

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20818 and 20825. The biggest common factor number is the GCF number.
So the greatest common factor 20818 and 20825 is 7.

Also check out the Least Common Multiple of 20818 and 20825