What is the Greatest Common Factor of 20851 and 20860?

Greatest common factor (GCF) of 20851 and 20860 is 1.

GCF(20851,20860) = 1

We will now calculate the prime factors of 20851 and 20860, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20851 and 20860.

How to find the GCF of 20851 and 20860?

We will first find the prime factorization of 20851 and 20860. After we will calculate the factors of 20851 and 20860 and find the biggest common factor number .

Step-1: Prime Factorization of 20851

Prime factors of 20851 are 29, 719. Prime factorization of 20851 in exponential form is:

20851 = 29¹ × 719¹

Step-2: Prime Factorization of 20860

Prime factors of 20860 are 2, 5, 7, 149. Prime factorization of 20860 in exponential form is:

20860 = 2² × 5¹ × 7¹ × 149¹

Step-3: Factors of 20851

List of positive integer factors of 20851 that divides 20851 without a remainder.

1, 29, 719

Step-4: Factors of 20860

List of positive integer factors of 20860 that divides 20851 without a remainder.

1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 149, 298, 596, 745, 1043, 1490, 2086, 2980, 4172, 5215, 10430

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20851 and 20860. The biggest common factor number is the GCF number.
So the greatest common factor 20851 and 20860 is 1.

Also check out the Least Common Multiple of 20851 and 20860