GCD of 645, 343, 721, 396 Calculator

Given Input numbers are 645, 343, 721, 396

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 343 :

The positive integer divisors of 343 that completely divides 343 are.

1, 7, 49, 343

Divisors of 721 :

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

1, 7, 103, 721

Divisors of 396 :

The positive integer divisors of 396 that completely divides 396 are.

1, 2, 3, 4, 6, 9, 11, 12, 18, 22, 33, 36, 44, 66, 99, 132, 198, 396

GCD of numbers is the greatest common divisor

So, the GCD (645, 343, 721, 396) = 1.

Given numbers are 645, 343, 721, 396

The list of prime factors of all numbers are

Prime factors of 645 are 3 x 5 x 43

Prime factors of 343 are 7 x 7 x 7

Prime factors of 721 are 7 x 103

Prime factors of 396 are 2 x 2 x 3 x 3 x 11

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

Given numbers are 645, 343, 721, 396

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

Apply this formula for all numbers.

Step1:

LCM(645, 343) = 221235

GCD(645, 343) = ( 645 x 343 ) / 221235

= 645 / 343

= 645

Step2:

LCM(1, 721) = 721

GCD(1, 721) = ( 1 x 721 ) / 721

= 1 / 721

= 1

Step3:

LCM(1, 396) = 396

GCD(1, 396) = ( 1 x 396 ) / 396

= 1 / 396

= 1

So, Greatest Common Divisor of 645, 343, 721, 396 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 635, 526, 719, 329
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Given numbers are 645, 343, 721, 396
The greatest common divisor of numbers 645, 343, 721, 396 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 645, 343, 721, 396 is 1.

1. What is the GCD of 645, 343, 721, 396?

GCD of given numbers 645, 343, 721, 396 is 1

2. How to calculate the greatest common divisor of 645, 343, 721, 396?

We can find the highest common divisor of 645, 343, 721, 396 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, 343, 721, 396 i.e 1.

3. How can I use the GCD of 645, 343, 721, 396Calculator?

Out the numbers 645, 343, 721, 396 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.