GCD of 781, 378, 645, 161 Calculator

Given Input numbers are 781, 378, 645, 161

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

Divisors of 781 :

The positive integer divisors of 781 that completely divides 781 are.

1, 11, 71, 781

Divisors of 378 :

The positive integer divisors of 378 that completely divides 378 are.

1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 189, 378

Divisors of 645 :

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

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

Divisors of 161 :

The positive integer divisors of 161 that completely divides 161 are.

1, 7, 23, 161

GCD of numbers is the greatest common divisor

So, the GCD (781, 378, 645, 161) = 1.

Given numbers are 781, 378, 645, 161

The list of prime factors of all numbers are

Prime factors of 781 are 11 x 71

Prime factors of 378 are 2 x 3 x 3 x 3 x 7

Prime factors of 645 are 3 x 5 x 43

Prime factors of 161 are 7 x 23

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

Given numbers are 781, 378, 645, 161

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

Apply this formula for all numbers.

Step1:

LCM(781, 378) = 295218

GCD(781, 378) = ( 781 x 378 ) / 295218

= 781 / 378

= 781

Step2:

LCM(1, 645) = 645

GCD(1, 645) = ( 1 x 645 ) / 645

= 1 / 645

= 1

Step3:

LCM(1, 161) = 161

GCD(1, 161) = ( 1 x 161 ) / 161

= 1 / 161

= 1

So, Greatest Common Divisor of 781, 378, 645, 161 is 1

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Given numbers are 781, 378, 645, 161
The greatest common divisor of numbers 781, 378, 645, 161 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 781, 378, 645, 161 is 1.

1. What is the GCD of 781, 378, 645, 161?

GCD of given numbers 781, 378, 645, 161 is 1

2. How to calculate the greatest common divisor of 781, 378, 645, 161?

We can find the highest common divisor of 781, 378, 645, 161 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 781, 378, 645, 161 i.e 1.

3. How can I use the GCD of 781, 378, 645, 161Calculator?

Out the numbers 781, 378, 645, 161 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.