GCD of 434, 788, 20, 639 Calculator

Given Input numbers are 434, 788, 20, 639

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

Divisors of 434 :

The positive integer divisors of 434 that completely divides 434 are.

1, 2, 7, 14, 31, 62, 217, 434

Divisors of 788 :

The positive integer divisors of 788 that completely divides 788 are.

1, 2, 4, 197, 394, 788

Divisors of 20 :

The positive integer divisors of 20 that completely divides 20 are.

1, 2, 4, 5, 10, 20

Divisors of 639 :

The positive integer divisors of 639 that completely divides 639 are.

1, 3, 9, 71, 213, 639

GCD of numbers is the greatest common divisor

So, the GCD (434, 788, 20, 639) = 1.

Given numbers are 434, 788, 20, 639

The list of prime factors of all numbers are

Prime factors of 434 are 2 x 7 x 31

Prime factors of 788 are 2 x 2 x 197

Prime factors of 20 are 2 x 2 x 5

Prime factors of 639 are 3 x 3 x 71

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

Given numbers are 434, 788, 20, 639

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

Apply this formula for all numbers.

Step1:

LCM(434, 788) = 170996

GCD(434, 788) = ( 434 x 788 ) / 170996

= 434 / 788

= 434

Step2:

LCM(2, 20) = 20

GCD(2, 20) = ( 2 x 20 ) / 20

= 2 / 20

= 2

Step3:

LCM(2, 639) = 1278

GCD(2, 639) = ( 2 x 639 ) / 1278

= 2 / 639

= 2

So, Greatest Common Divisor of 434, 788, 20, 639 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 813, 275, 80, 594
• GCD of 780, 423, 23, 399
• GCD of 570, 181, 82, 450
• GCD of 437, 572, 25, 975
• GCD of 813, 542, 34, 200

Given numbers are 434, 788, 20, 639
The greatest common divisor of numbers 434, 788, 20, 639 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 434, 788, 20, 639 is 1.

1. What is the GCD of 434, 788, 20, 639?

GCD of given numbers 434, 788, 20, 639 is 1

2. How to calculate the greatest common divisor of 434, 788, 20, 639?

We can find the highest common divisor of 434, 788, 20, 639 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 434, 788, 20, 639 i.e 1.

3. How can I use the GCD of 434, 788, 20, 639Calculator?

Out the numbers 434, 788, 20, 639 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.