What is the Greatest Common Factor of 820 and 830?

Greatest common factor (GCF) of 820 and 830 is 10.

GCF(820,830) = 10

We will now calculate the prime factors of 820 and 830, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 820 and 830.

How to find the GCF of 820 and 830?

We will first find the prime factorization of 820 and 830. After we will calculate the factors of 820 and 830 and find the biggest common factor number .

Step-1: Prime Factorization of 820

Prime factors of 820 are 2, 5, 41. Prime factorization of 820 in exponential form is:

820 = 2² × 5¹ × 41¹

Step-2: Prime Factorization of 830

Prime factors of 830 are 2, 5, 83. Prime factorization of 830 in exponential form is:

830 = 2¹ × 5¹ × 83¹

Step-3: Factors of 820

List of positive integer factors of 820 that divides 820 without a remainder.

1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410

Step-4: Factors of 830

List of positive integer factors of 830 that divides 820 without a remainder.

1, 2, 5, 10, 83, 166, 415

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 820 and 830. The biggest common factor number is the GCF number.
So the greatest common factor 820 and 830 is 10.

Also check out the Least Common Multiple of 820 and 830