GCD of 645, 397, 686 Calculator

Given Input numbers are 645, 397, 686

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

Divisors of 645 :

The positive integer divisors of 645 that completely divides 645 are.

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

Divisors of 397 :

The positive integer divisors of 397 that completely divides 397 are.

1, 397

Divisors of 686 :

The positive integer divisors of 686 that completely divides 686 are.

1, 2, 7, 14, 49, 98, 343, 686

GCD of numbers is the greatest common divisor

So, the GCD (645, 397, 686) = 1.

Given numbers are 645, 397, 686

The list of prime factors of all numbers are

Prime factors of 645 are 3 x 5 x 43

Prime factors of 397 are 397

Prime factors of 686 are 2 x 7 x 7 x 7

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

Given numbers are 645, 397, 686

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

Apply this formula for all numbers.

Step1:

LCM(645, 397) = 256065

GCD(645, 397) = ( 645 x 397 ) / 256065

= 645 / 397

= 645

Step2:

LCM(1, 686) = 686

GCD(1, 686) = ( 1 x 686 ) / 686

= 1 / 686

= 1

So, Greatest Common Divisor of 645, 397, 686 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 161, 513, 105
• GCD of 402, 184, 291
• GCD of 145, 674, 368
• GCD of 630, 699, 348
• GCD of 196, 276, 171

Given numbers are 645, 397, 686
The greatest common divisor of numbers 645, 397, 686 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 645, 397, 686 is 1.

1. What is the GCD of 645, 397, 686?

GCD of given numbers 645, 397, 686 is 1

2. How to calculate the greatest common divisor of 645, 397, 686?

We can find the highest common divisor of 645, 397, 686 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 645, 397, 686 i.e 1.

3. How can I use the GCD of 645, 397, 686Calculator?

Out the numbers 645, 397, 686 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.