GCD of 45, 4, 80, 18 Calculator

Given Input numbers are 45, 4, 80, 18

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

Divisors of 45

List of positive integer divisors of 45 that divides 45 without a remainder.

1, 3, 5, 9, 15, 45

Divisors of 4

List of positive integer divisors of 4 that divides 4 without a remainder.

1, 2, 4

Divisors of 80

List of positive integer divisors of 80 that divides 80 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 40, 80

Divisors of 18

List of positive integer divisors of 18 that divides 18 without a remainder.

1, 2, 3, 6, 9, 18

Greatest Common Divisior

We found the divisors of 45, 4, 80, 18 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 45, 4, 80, 18 is 1.

Therefore, GCD of numbers 45, 4, 80, 18 is 1

Given Input Data is 45, 4, 80, 18

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

Prime Factorization of 45 is 3 x 3 x 5

Prime Factorization of 4 is 2 x 2

Prime Factorization of 80 is 2 x 2 x 2 x 2 x 5

Prime Factorization of 18 is 2 x 3 x 3

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(45, 4) = 180

GCD(45, 4) = ( 45 x 4 ) / 180

GCD(45, 4) = 180 / 180

GCD(45, 4) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 80

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

LCM(1, 80) = 80

GCD(1, 80) = ( 1 x 80 ) / 80

GCD(1, 80) = 80 / 80

GCD(1, 80) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 18

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

LCM(1, 18) = 18

GCD(1, 18) = ( 1 x 18 ) / 18

GCD(1, 18) = 18 / 18

GCD(1, 18) = 1

GCD of 45, 4, 80, 18 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 26, 1, 47, 57
• GCD of 55, 3, 84, 71
• GCD of 85, 6, 10, 84
• GCD of 74, 8, 34, 79
• GCD of 29, 3, 28, 84

1. What is the GCD of 45, 4, 80, 18?

GCD of 45, 4, 80, 18 is 1

2. Where do I get the detailed procedure to find GCD of 45, 4, 80, 18?

You can find a detailed procedure to find GCD of 45, 4, 80, 18 on our page.

3. How to find GCD of 45, 4, 80, 18 on a calculator?

You can find the GCD of 45, 4, 80, 18 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.