GCD of 24, 51, 21, 20 Calculator

Given Input numbers are 24, 51, 21, 20

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

Divisors of 24

List of positive integer divisors of 24 that divides 24 without a remainder.

1, 2, 3, 4, 6, 8, 12, 24

Divisors of 51

List of positive integer divisors of 51 that divides 51 without a remainder.

1, 3, 17, 51

Divisors of 21

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

1, 3, 7, 21

Divisors of 20

List of positive integer divisors of 20 that divides 20 without a remainder.

1, 2, 4, 5, 10, 20

Greatest Common Divisior

We found the divisors of 24, 51, 21, 20 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 24, 51, 21, 20 is 1.

Therefore, GCD of numbers 24, 51, 21, 20 is 1

Given Input Data is 24, 51, 21, 20

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

Prime Factorization of 24 is 2 x 2 x 2 x 3

Prime Factorization of 51 is 3 x 17

Prime Factorization of 21 is 3 x 7

Prime Factorization of 20 is 2 x 2 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(24, 51) = 408

GCD(24, 51) = ( 24 x 51 ) / 408

GCD(24, 51) = 1224 / 408

GCD(24, 51) = 3

Step2:

Here we consider the GCD from the above i.e. 3 as first number and the next as 21

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

LCM(3, 21) = 21

GCD(3, 21) = ( 3 x 21 ) / 21

GCD(3, 21) = 63 / 21

GCD(3, 21) = 3

Step3:

Here we consider the GCD from the above i.e. 3 as first number and the next as 20

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

LCM(3, 20) = 60

GCD(3, 20) = ( 3 x 20 ) / 60

GCD(3, 20) = 60 / 60

GCD(3, 20) = 1

GCD of 24, 51, 21, 20 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 82, 39, 94, 50
• GCD of 62, 61, 72, 55
• GCD of 87, 39, 57, 38
• GCD of 67, 89, 84, 10
• GCD of 55, 24, 75, 42

1. What is the GCD of 24, 51, 21, 20?

GCD of 24, 51, 21, 20 is 1

2. Where do I get the detailed procedure to find GCD of 24, 51, 21, 20?

You can find a detailed procedure to find GCD of 24, 51, 21, 20 on our page.

3. How to find GCD of 24, 51, 21, 20 on a calculator?

You can find the GCD of 24, 51, 21, 20 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.