GCD of 687, 642, 721 Calculator

Given Input numbers are 687, 642, 721

In the factoring method, we have to find the divisors of all numbers

Divisors of 687 :

The positive integer divisors of 687 that completely divides 687 are.

1, 3, 229, 687

Divisors of 642 :

The positive integer divisors of 642 that completely divides 642 are.

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

Divisors of 721 :

The positive integer divisors of 721 that completely divides 721 are.

1, 7, 103, 721

GCD of numbers is the greatest common divisor

So, the GCD (687, 642, 721) = 1.

Given numbers are 687, 642, 721

The list of prime factors of all numbers are

Prime factors of 687 are 3 x 229

Prime factors of 642 are 2 x 3 x 107

Prime factors of 721 are 7 x 103

The above numbers do not have any common prime factor. So GCD is 1

Given numbers are 687, 642, 721

GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)

Apply this formula for all numbers.

Step1:

LCM(687, 642) = 147018

GCD(687, 642) = ( 687 x 642 ) / 147018

= 687 / 642

= 687

Step2:

LCM(3, 721) = 2163

GCD(3, 721) = ( 3 x 721 ) / 2163

= 3 / 721

= 3

So, Greatest Common Divisor of 687, 642, 721 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 151, 769, 884
• GCD of 986, 126, 215
• GCD of 150, 117, 967
• GCD of 507, 926, 714
• GCD of 144, 441, 338

Given numbers are 687, 642, 721
The greatest common divisor of numbers 687, 642, 721 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 687, 642, 721 is 1.

1. What is the GCD of 687, 642, 721?

GCD of given numbers 687, 642, 721 is 1

2. How to calculate the greatest common divisor of 687, 642, 721?

We can find the highest common divisor of 687, 642, 721 easily using the prime factorization method. Just list the prime factors of all numbers and pick the highest common factor which is the GCD of 687, 642, 721 i.e 1.

3. How can I use the GCD of 687, 642, 721Calculator?

Out the numbers 687, 642, 721 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.