GCD of 61, 74, 21, 79 Calculator

Given Input numbers are 61, 74, 21, 79

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

Divisors of 61

List of positive integer divisors of 61 that divides 61 without a remainder.

1, 61

Divisors of 74

List of positive integer divisors of 74 that divides 74 without a remainder.

1, 2, 37, 74

Divisors of 21

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

1, 3, 7, 21

Divisors of 79

List of positive integer divisors of 79 that divides 79 without a remainder.

1, 79

Greatest Common Divisior

We found the divisors of 61, 74, 21, 79 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 61, 74, 21, 79 is 1.

Therefore, GCD of numbers 61, 74, 21, 79 is 1

Given Input Data is 61, 74, 21, 79

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

Prime Factorization of 61 is 61

Prime Factorization of 74 is 2 x 37

Prime Factorization of 21 is 3 x 7

Prime Factorization of 79 is 79

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(61, 74) = 4514

GCD(61, 74) = ( 61 x 74 ) / 4514

GCD(61, 74) = 4514 / 4514

GCD(61, 74) = 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 79

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

LCM(1, 79) = 79

GCD(1, 79) = ( 1 x 79 ) / 79

GCD(1, 79) = 79 / 79

GCD(1, 79) = 1

GCD of 61, 74, 21, 79 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 66, 25, 22, 98
• GCD of 60, 39, 97, 74
• GCD of 64, 34, 58, 18
• GCD of 49, 12, 59, 11
• GCD of 11, 45, 16, 18

1. What is the GCD of 61, 74, 21, 79?

GCD of 61, 74, 21, 79 is 1

2. Where do I get the detailed procedure to find GCD of 61, 74, 21, 79?

You can find a detailed procedure to find GCD of 61, 74, 21, 79 on our page.

3. How to find GCD of 61, 74, 21, 79 on a calculator?

You can find the GCD of 61, 74, 21, 79 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.