GCD of 221, 645, 73, 164 Calculator

Given Input numbers are 221, 645, 73, 164

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

Divisors of 221

List of positive integer divisors of 221 that divides 221 without a remainder.

1, 13, 17, 221

Divisors of 645

List of positive integer divisors of 645 that divides 645 without a remainder.

1, 3, 5, 15, 43, 129, 215, 645

Divisors of 73

List of positive integer divisors of 73 that divides 73 without a remainder.

1, 73

Divisors of 164

List of positive integer divisors of 164 that divides 164 without a remainder.

1, 2, 4, 41, 82, 164

Greatest Common Divisior

We found the divisors of 221, 645, 73, 164 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 221, 645, 73, 164 is 1.

Therefore, GCD of numbers 221, 645, 73, 164 is 1

Given Input Data is 221, 645, 73, 164

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

Prime Factorization of 221 is 13 x 17

Prime Factorization of 645 is 3 x 5 x 43

Prime Factorization of 73 is 73

Prime Factorization of 164 is 2 x 2 x 41

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(221, 645) = 142545

GCD(221, 645) = ( 221 x 645 ) / 142545

GCD(221, 645) = 142545 / 142545

GCD(221, 645) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 73

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

LCM(1, 73) = 73

GCD(1, 73) = ( 1 x 73 ) / 73

GCD(1, 73) = 73 / 73

GCD(1, 73) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 164

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

LCM(1, 164) = 164

GCD(1, 164) = ( 1 x 164 ) / 164

GCD(1, 164) = 164 / 164

GCD(1, 164) = 1

GCD of 221, 645, 73, 164 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 834, 223, 23, 451
• GCD of 692, 336, 98, 479
• GCD of 686, 203, 43, 816
• GCD of 136, 204, 77, 659
• GCD of 227, 715, 58, 247

1. What is the GCD of 221, 645, 73, 164?

GCD of 221, 645, 73, 164 is 1

2. Where do I get the detailed procedure to find GCD of 221, 645, 73, 164?

You can find a detailed procedure to find GCD of 221, 645, 73, 164 on our page.

3. How to find GCD of 221, 645, 73, 164 on a calculator?

You can find the GCD of 221, 645, 73, 164 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.