What is the Greatest Common Factor of 16820 and 16840?

Greatest common factor (GCF) of 16820 and 16840 is 20.

GCF(16820,16840) = 20

We will now calculate the prime factors of 16820 and 16840, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 16820 and 16840.

How to find the GCF of 16820 and 16840?

We will first find the prime factorization of 16820 and 16840. After we will calculate the factors of 16820 and 16840 and find the biggest common factor number .

Step-1: Prime Factorization of 16820

Prime factors of 16820 are 2, 5, 29. Prime factorization of 16820 in exponential form is:

16820 = 2² × 5¹ × 29²

Step-2: Prime Factorization of 16840

Prime factors of 16840 are 2, 5, 421. Prime factorization of 16840 in exponential form is:

16840 = 2³ × 5¹ × 421¹

Step-3: Factors of 16820

List of positive integer factors of 16820 that divides 16820 without a remainder.

1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 841, 1682, 3364, 4205, 8410

Step-4: Factors of 16840

List of positive integer factors of 16840 that divides 16820 without a remainder.

1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1684, 2105, 3368, 4210, 8420

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 16820 and 16840. The biggest common factor number is the GCF number.
So the greatest common factor 16820 and 16840 is 20.

Also check out the Least Common Multiple of 16820 and 16840