GCD of 455, 165, 28, 851 Calculator

Given Input numbers are 455, 165, 28, 851

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

Divisors of 455

List of positive integer divisors of 455 that divides 455 without a remainder.

1, 5, 7, 13, 35, 65, 91, 455

Divisors of 165

List of positive integer divisors of 165 that divides 165 without a remainder.

1, 3, 5, 11, 15, 33, 55, 165

Divisors of 28

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

1, 2, 4, 7, 14, 28

Divisors of 851

List of positive integer divisors of 851 that divides 851 without a remainder.

1, 23, 37, 851

Greatest Common Divisior

We found the divisors of 455, 165, 28, 851 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 455, 165, 28, 851 is 1.

Therefore, GCD of numbers 455, 165, 28, 851 is 1

Given Input Data is 455, 165, 28, 851

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

Prime Factorization of 455 is 5 x 7 x 13

Prime Factorization of 165 is 3 x 5 x 11

Prime Factorization of 28 is 2 x 2 x 7

Prime Factorization of 851 is 23 x 37

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(455, 165) = 15015

GCD(455, 165) = ( 455 x 165 ) / 15015

GCD(455, 165) = 75075 / 15015

GCD(455, 165) = 5

Step2:

Here we consider the GCD from the above i.e. 5 as first number and the next as 28

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

LCM(5, 28) = 140

GCD(5, 28) = ( 5 x 28 ) / 140

GCD(5, 28) = 140 / 140

GCD(5, 28) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 851

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

LCM(1, 851) = 851

GCD(1, 851) = ( 1 x 851 ) / 851

GCD(1, 851) = 851 / 851

GCD(1, 851) = 1

GCD of 455, 165, 28, 851 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 840, 752, 20, 831
• GCD of 674, 806, 74, 244
• GCD of 127, 392, 87, 869
• GCD of 527, 949, 82, 982
• GCD of 529, 915, 80, 263

1. What is the GCD of 455, 165, 28, 851?

GCD of 455, 165, 28, 851 is 1

2. Where do I get the detailed procedure to find GCD of 455, 165, 28, 851?

You can find a detailed procedure to find GCD of 455, 165, 28, 851 on our page.

3. How to find GCD of 455, 165, 28, 851 on a calculator?

You can find the GCD of 455, 165, 28, 851 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.