GCD of 647, 391, 742, 680 Calculator

Given Input numbers are 647, 391, 742, 680

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

Divisors of 647 :

The positive integer divisors of 647 that completely divides 647 are.

1, 647

Divisors of 391 :

The positive integer divisors of 391 that completely divides 391 are.

1, 17, 23, 391

Divisors of 742 :

The positive integer divisors of 742 that completely divides 742 are.

1, 2, 7, 14, 53, 106, 371, 742

Divisors of 680 :

The positive integer divisors of 680 that completely divides 680 are.

1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680

GCD of numbers is the greatest common divisor

So, the GCD (647, 391, 742, 680) = 1.

Given numbers are 647, 391, 742, 680

The list of prime factors of all numbers are

Prime factors of 647 are 647

Prime factors of 391 are 17 x 23

Prime factors of 742 are 2 x 7 x 53

Prime factors of 680 are 2 x 2 x 2 x 5 x 17

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

Given numbers are 647, 391, 742, 680

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

Apply this formula for all numbers.

Step1:

LCM(647, 391) = 252977

GCD(647, 391) = ( 647 x 391 ) / 252977

= 647 / 391

= 647

Step2:

LCM(1, 742) = 742

GCD(1, 742) = ( 1 x 742 ) / 742

= 1 / 742

= 1

Step3:

LCM(1, 680) = 680

GCD(1, 680) = ( 1 x 680 ) / 680

= 1 / 680

= 1

So, Greatest Common Divisor of 647, 391, 742, 680 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 641, 222, 899, 247
• GCD of 346, 530, 773, 977
• GCD of 491, 813, 340, 707
• GCD of 881, 364, 987, 700
• GCD of 209, 300, 254, 509

Given numbers are 647, 391, 742, 680
The greatest common divisor of numbers 647, 391, 742, 680 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 647, 391, 742, 680 is 1.

1. What is the GCD of 647, 391, 742, 680?

GCD of given numbers 647, 391, 742, 680 is 1

2. How to calculate the greatest common divisor of 647, 391, 742, 680?

We can find the highest common divisor of 647, 391, 742, 680 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 647, 391, 742, 680 i.e 1.

3. How can I use the GCD of 647, 391, 742, 680Calculator?

Out the numbers 647, 391, 742, 680 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.