GCD of 655, 661, 21, 472 Calculator

Given Input numbers are 655, 661, 21, 472

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

Divisors of 655

List of positive integer divisors of 655 that divides 655 without a remainder.

1, 5, 131, 655

Divisors of 661

List of positive integer divisors of 661 that divides 661 without a remainder.

1, 661

Divisors of 21

List of positive integer divisors of 21 that divides 21 without a remainder.

1, 3, 7, 21

Divisors of 472

List of positive integer divisors of 472 that divides 472 without a remainder.

1, 2, 4, 8, 59, 118, 236, 472

Greatest Common Divisior

We found the divisors of 655, 661, 21, 472 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 655, 661, 21, 472 is 1.

Therefore, GCD of numbers 655, 661, 21, 472 is 1

Given Input Data is 655, 661, 21, 472

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

Prime Factorization of 655 is 5 x 131

Prime Factorization of 661 is 661

Prime Factorization of 21 is 3 x 7

Prime Factorization of 472 is 2 x 2 x 2 x 59

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(655, 661) = 432955

GCD(655, 661) = ( 655 x 661 ) / 432955

GCD(655, 661) = 432955 / 432955

GCD(655, 661) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 21

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

LCM(1, 21) = 21

GCD(1, 21) = ( 1 x 21 ) / 21

GCD(1, 21) = 21 / 21

GCD(1, 21) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 472

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

LCM(1, 472) = 472

GCD(1, 472) = ( 1 x 472 ) / 472

GCD(1, 472) = 472 / 472

GCD(1, 472) = 1

GCD of 655, 661, 21, 472 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 725, 900, 39, 397
• GCD of 730, 822, 41, 996
• GCD of 969, 464, 38, 890
• GCD of 732, 851, 52, 986
• GCD of 183, 398, 92, 874

1. What is the GCD of 655, 661, 21, 472?

GCD of 655, 661, 21, 472 is 1

2. Where do I get the detailed procedure to find GCD of 655, 661, 21, 472?

You can find a detailed procedure to find GCD of 655, 661, 21, 472 on our page.

3. How to find GCD of 655, 661, 21, 472 on a calculator?

You can find the GCD of 655, 661, 21, 472 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.