GCD of 166, 642, 455, 163 Calculator

Given Input numbers are 166, 642, 455, 163

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

Divisors of 166

List of positive integer divisors of 166 that divides 166 without a remainder.

1, 2, 83, 166

Divisors of 642

List of positive integer divisors of 642 that divides 642 without a remainder.

1, 2, 3, 6, 107, 214, 321, 642

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 163

List of positive integer divisors of 163 that divides 163 without a remainder.

1, 163

Greatest Common Divisior

We found the divisors of 166, 642, 455, 163 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 166, 642, 455, 163 is 1.

Therefore, GCD of numbers 166, 642, 455, 163 is 1

Given Input Data is 166, 642, 455, 163

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

Prime Factorization of 166 is 2 x 83

Prime Factorization of 642 is 2 x 3 x 107

Prime Factorization of 455 is 5 x 7 x 13

Prime Factorization of 163 is 163

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(166, 642) = 53286

GCD(166, 642) = ( 166 x 642 ) / 53286

GCD(166, 642) = 106572 / 53286

GCD(166, 642) = 2

Step2:

Here we consider the GCD from the above i.e. 2 as first number and the next as 455

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

LCM(2, 455) = 910

GCD(2, 455) = ( 2 x 455 ) / 910

GCD(2, 455) = 910 / 910

GCD(2, 455) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 163

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

LCM(1, 163) = 163

GCD(1, 163) = ( 1 x 163 ) / 163

GCD(1, 163) = 163 / 163

GCD(1, 163) = 1

GCD of 166, 642, 455, 163 is 1

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1. What is the GCD of 166, 642, 455, 163?

GCD of 166, 642, 455, 163 is 1

2. Where do I get the detailed procedure to find GCD of 166, 642, 455, 163?

You can find a detailed procedure to find GCD of 166, 642, 455, 163 on our page.

3. How to find GCD of 166, 642, 455, 163 on a calculator?

You can find the GCD of 166, 642, 455, 163 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.