GCD of 220, 639, 87 Calculator

Given Input numbers are 220, 639, 87

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

Divisors of 220

List of positive integer divisors of 220 that divides 220 without a remainder.

1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220

Divisors of 639

List of positive integer divisors of 639 that divides 639 without a remainder.

1, 3, 9, 71, 213, 639

Divisors of 87

List of positive integer divisors of 87 that divides 87 without a remainder.

1, 3, 29, 87

Greatest Common Divisior

We found the divisors of 220, 639, 87 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 220, 639, 87 is 1.

Therefore, GCD of numbers 220, 639, 87 is 1

Given Input Data is 220, 639, 87

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

Prime Factorization of 220 is 2 x 2 x 5 x 11

Prime Factorization of 639 is 3 x 3 x 71

Prime Factorization of 87 is 3 x 29

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(220, 639) = 140580

GCD(220, 639) = ( 220 x 639 ) / 140580

GCD(220, 639) = 140580 / 140580

GCD(220, 639) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 87

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

LCM(1, 87) = 87

GCD(1, 87) = ( 1 x 87 ) / 87

GCD(1, 87) = 87 / 87

GCD(1, 87) = 1

GCD of 220, 639, 87 is 1

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1. What is the GCD of 220, 639, 87?

GCD of 220, 639, 87 is 1

2. Where do I get the detailed procedure to find GCD of 220, 639, 87?

You can find a detailed procedure to find GCD of 220, 639, 87 on our page.

3. How to find GCD of 220, 639, 87 on a calculator?

You can find the GCD of 220, 639, 87 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.