GCD of 251, 122, 987, 789 Calculator

Given Input numbers are 251, 122, 987, 789

To find the GCD of numbers using factoring list out all the divisors of each number

Divisors of 251

List of positive integer divisors of 251 that divides 251 without a remainder.

1, 251

Divisors of 122

List of positive integer divisors of 122 that divides 122 without a remainder.

1, 2, 61, 122

Divisors of 987

List of positive integer divisors of 987 that divides 987 without a remainder.

1, 3, 7, 21, 47, 141, 329, 987

Divisors of 789

List of positive integer divisors of 789 that divides 789 without a remainder.

1, 3, 263, 789

Greatest Common Divisior

We found the divisors of 251, 122, 987, 789 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 251, 122, 987, 789 is 1.

Therefore, GCD of numbers 251, 122, 987, 789 is 1

Given Input Data is 251, 122, 987, 789

Make a list of Prime Factors of all the given numbers initially

Prime Factorization of 251 is 251

Prime Factorization of 122 is 2 x 61

Prime Factorization of 987 is 3 x 7 x 47

Prime Factorization of 789 is 3 x 263

The above numbers do not have any common prime factor. So GCD is 1

Step1:

Let's calculate the GCD of first two numbers

The formula of GCD is GCD(a, b) = ( a x b) / LCM(a, b)

LCM(251, 122) = 30622

GCD(251, 122) = ( 251 x 122 ) / 30622

GCD(251, 122) = 30622 / 30622

GCD(251, 122) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 987

The formula of GCD is GCD(a, b) = ( a x b) / LCM(a, b)

LCM(1, 987) = 987

GCD(1, 987) = ( 1 x 987 ) / 987

GCD(1, 987) = 987 / 987

GCD(1, 987) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 789

The formula of GCD is GCD(a, b) = ( a x b) / LCM(a, b)

LCM(1, 789) = 789

GCD(1, 789) = ( 1 x 789 ) / 789

GCD(1, 789) = 789 / 789

GCD(1, 789) = 1

GCD of 251, 122, 987, 789 is 1

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1. What is the GCD of 251, 122, 987, 789?

GCD of 251, 122, 987, 789 is 1

2. Where do I get the detailed procedure to find GCD of 251, 122, 987, 789?

You can find a detailed procedure to find GCD of 251, 122, 987, 789 on our page.

3. How to find GCD of 251, 122, 987, 789 on a calculator?

You can find the GCD of 251, 122, 987, 789 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.