GCD of 87, 60, 28, 30 Calculator

Given Input numbers are 87, 60, 28, 30

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

Divisors of 87

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

1, 3, 29, 87

Divisors of 60

List of positive integer divisors of 60 that divides 60 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60

Divisors of 28

List of positive integer divisors of 28 that divides 28 without a remainder.

1, 2, 4, 7, 14, 28

Divisors of 30

List of positive integer divisors of 30 that divides 30 without a remainder.

1, 2, 3, 5, 6, 10, 15, 30

Greatest Common Divisior

We found the divisors of 87, 60, 28, 30 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 87, 60, 28, 30 is 1.

Therefore, GCD of numbers 87, 60, 28, 30 is 1

Given Input Data is 87, 60, 28, 30

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

Prime Factorization of 87 is 3 x 29

Prime Factorization of 60 is 2 x 2 x 3 x 5

Prime Factorization of 28 is 2 x 2 x 7

Prime Factorization of 30 is 2 x 3 x 5

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(87, 60) = 1740

GCD(87, 60) = ( 87 x 60 ) / 1740

GCD(87, 60) = 5220 / 1740

GCD(87, 60) = 3

Step2:

Here we consider the GCD from the above i.e. 3 as first number and the next as 28

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

LCM(3, 28) = 84

GCD(3, 28) = ( 3 x 28 ) / 84

GCD(3, 28) = 84 / 84

GCD(3, 28) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 30

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

LCM(1, 30) = 30

GCD(1, 30) = ( 1 x 30 ) / 30

GCD(1, 30) = 30 / 30

GCD(1, 30) = 1

GCD of 87, 60, 28, 30 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 58, 48, 65, 46
• GCD of 17, 55, 49, 15
• GCD of 34, 58, 89, 85
• GCD of 73, 76, 66, 61
• GCD of 78, 58, 91, 87

1. What is the GCD of 87, 60, 28, 30?

GCD of 87, 60, 28, 30 is 1

2. Where do I get the detailed procedure to find GCD of 87, 60, 28, 30?

You can find a detailed procedure to find GCD of 87, 60, 28, 30 on our page.

3. How to find GCD of 87, 60, 28, 30 on a calculator?

You can find the GCD of 87, 60, 28, 30 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.