What is the Greatest Common Factor of 10985 and 10990?

Greatest common factor (GCF) of 10985 and 10990 is 5.

GCF(10985,10990) = 5

We will now calculate the prime factors of 10985 and 10990, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 10985 and 10990.

How to find the GCF of 10985 and 10990?

We will first find the prime factorization of 10985 and 10990. After we will calculate the factors of 10985 and 10990 and find the biggest common factor number .

Step-1: Prime Factorization of 10985

Prime factors of 10985 are 5, 13. Prime factorization of 10985 in exponential form is:

10985 = 5¹ × 13³

Step-2: Prime Factorization of 10990

Prime factors of 10990 are 2, 5, 7, 157. Prime factorization of 10990 in exponential form is:

10990 = 2¹ × 5¹ × 7¹ × 157¹

Step-3: Factors of 10985

List of positive integer factors of 10985 that divides 10985 without a remainder.

1, 5, 13, 65, 169, 845, 2197

Step-4: Factors of 10990

List of positive integer factors of 10990 that divides 10985 without a remainder.

1, 2, 5, 7, 10, 14, 35, 70, 157, 314, 785, 1099, 1570, 2198, 5495

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 10985 and 10990. The biggest common factor number is the GCF number.
So the greatest common factor 10985 and 10990 is 5.

Also check out the Least Common Multiple of 10985 and 10990