GCD of 988, 561, 142, 391 Calculator

Given Input numbers are 988, 561, 142, 391

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

Divisors of 988

List of positive integer divisors of 988 that divides 988 without a remainder.

1, 2, 4, 13, 19, 26, 38, 52, 76, 247, 494, 988

Divisors of 561

List of positive integer divisors of 561 that divides 561 without a remainder.

1, 3, 11, 17, 33, 51, 187, 561

Divisors of 142

List of positive integer divisors of 142 that divides 142 without a remainder.

1, 2, 71, 142

Divisors of 391

List of positive integer divisors of 391 that divides 391 without a remainder.

1, 17, 23, 391

Greatest Common Divisior

We found the divisors of 988, 561, 142, 391 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 988, 561, 142, 391 is 1.

Therefore, GCD of numbers 988, 561, 142, 391 is 1

Given Input Data is 988, 561, 142, 391

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

Prime Factorization of 988 is 2 x 2 x 13 x 19

Prime Factorization of 561 is 3 x 11 x 17

Prime Factorization of 142 is 2 x 71

Prime Factorization of 391 is 17 x 23

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(988, 561) = 554268

GCD(988, 561) = ( 988 x 561 ) / 554268

GCD(988, 561) = 554268 / 554268

GCD(988, 561) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 142

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

LCM(1, 142) = 142

GCD(1, 142) = ( 1 x 142 ) / 142

GCD(1, 142) = 142 / 142

GCD(1, 142) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 391

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

LCM(1, 391) = 391

GCD(1, 391) = ( 1 x 391 ) / 391

GCD(1, 391) = 391 / 391

GCD(1, 391) = 1

GCD of 988, 561, 142, 391 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 816, 476, 865, 936
• GCD of 193, 413, 907, 995
• GCD of 554, 964, 236, 465
• GCD of 278, 196, 351, 596
• GCD of 977, 285, 704, 516

1. What is the GCD of 988, 561, 142, 391?

GCD of 988, 561, 142, 391 is 1

2. Where do I get the detailed procedure to find GCD of 988, 561, 142, 391?

You can find a detailed procedure to find GCD of 988, 561, 142, 391 on our page.

3. How to find GCD of 988, 561, 142, 391 on a calculator?

You can find the GCD of 988, 561, 142, 391 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.