GCD of 156, 170, 279, 721 Calculator

Given Input numbers are 156, 170, 279, 721

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

Divisors of 156

List of positive integer divisors of 156 that divides 156 without a remainder.

1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156

Divisors of 170

List of positive integer divisors of 170 that divides 170 without a remainder.

1, 2, 5, 10, 17, 34, 85, 170

Divisors of 279

List of positive integer divisors of 279 that divides 279 without a remainder.

1, 3, 9, 31, 93, 279

Divisors of 721

List of positive integer divisors of 721 that divides 721 without a remainder.

1, 7, 103, 721

Greatest Common Divisior

We found the divisors of 156, 170, 279, 721 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 156, 170, 279, 721 is 1.

Therefore, GCD of numbers 156, 170, 279, 721 is 1

Given Input Data is 156, 170, 279, 721

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

Prime Factorization of 156 is 2 x 2 x 3 x 13

Prime Factorization of 170 is 2 x 5 x 17

Prime Factorization of 279 is 3 x 3 x 31

Prime Factorization of 721 is 7 x 103

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(156, 170) = 13260

GCD(156, 170) = ( 156 x 170 ) / 13260

GCD(156, 170) = 26520 / 13260

GCD(156, 170) = 2

Step2:

Here we consider the GCD from the above i.e. 2 as first number and the next as 279

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

LCM(2, 279) = 558

GCD(2, 279) = ( 2 x 279 ) / 558

GCD(2, 279) = 558 / 558

GCD(2, 279) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 721

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

LCM(1, 721) = 721

GCD(1, 721) = ( 1 x 721 ) / 721

GCD(1, 721) = 721 / 721

GCD(1, 721) = 1

GCD of 156, 170, 279, 721 is 1

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• GCD of 422, 716, 301, 101
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1. What is the GCD of 156, 170, 279, 721?

GCD of 156, 170, 279, 721 is 1

2. Where do I get the detailed procedure to find GCD of 156, 170, 279, 721?

You can find a detailed procedure to find GCD of 156, 170, 279, 721 on our page.

3. How to find GCD of 156, 170, 279, 721 on a calculator?

You can find the GCD of 156, 170, 279, 721 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.