GCD of 648, 439, 21, 135 Calculator

Given Input numbers are 648, 439, 21, 135

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

Divisors of 648

List of positive integer divisors of 648 that divides 648 without a remainder.

1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 81, 108, 162, 216, 324, 648

Divisors of 439

List of positive integer divisors of 439 that divides 439 without a remainder.

1, 439

Divisors of 21

List of positive integer divisors of 21 that divides 21 without a remainder.

1, 3, 7, 21

Divisors of 135

List of positive integer divisors of 135 that divides 135 without a remainder.

1, 3, 5, 9, 15, 27, 45, 135

Greatest Common Divisior

We found the divisors of 648, 439, 21, 135 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 648, 439, 21, 135 is 1.

Therefore, GCD of numbers 648, 439, 21, 135 is 1

Given Input Data is 648, 439, 21, 135

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

Prime Factorization of 648 is 2 x 2 x 2 x 3 x 3 x 3 x 3

Prime Factorization of 439 is 439

Prime Factorization of 21 is 3 x 7

Prime Factorization of 135 is 3 x 3 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(648, 439) = 284472

GCD(648, 439) = ( 648 x 439 ) / 284472

GCD(648, 439) = 284472 / 284472

GCD(648, 439) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 21

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

LCM(1, 21) = 21

GCD(1, 21) = ( 1 x 21 ) / 21

GCD(1, 21) = 21 / 21

GCD(1, 21) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 135

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

LCM(1, 135) = 135

GCD(1, 135) = ( 1 x 135 ) / 135

GCD(1, 135) = 135 / 135

GCD(1, 135) = 1

GCD of 648, 439, 21, 135 is 1

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• GCD of 870, 844, 48, 707
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1. What is the GCD of 648, 439, 21, 135?

GCD of 648, 439, 21, 135 is 1

2. Where do I get the detailed procedure to find GCD of 648, 439, 21, 135?

You can find a detailed procedure to find GCD of 648, 439, 21, 135 on our page.

3. How to find GCD of 648, 439, 21, 135 on a calculator?

You can find the GCD of 648, 439, 21, 135 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.