GCD of 780, 620, 644, 977 Calculator

Given Input numbers are 780, 620, 644, 977

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

Divisors of 780 :

The positive integer divisors of 780 that completely divides 780 are.

1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780

Divisors of 620 :

The positive integer divisors of 620 that completely divides 620 are.

1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620

Divisors of 644 :

The positive integer divisors of 644 that completely divides 644 are.

1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644

Divisors of 977 :

The positive integer divisors of 977 that completely divides 977 are.

1, 977

GCD of numbers is the greatest common divisor

So, the GCD (780, 620, 644, 977) = 1.

Given numbers are 780, 620, 644, 977

The list of prime factors of all numbers are

Prime factors of 780 are 2 x 2 x 3 x 5 x 13

Prime factors of 620 are 2 x 2 x 5 x 31

Prime factors of 644 are 2 x 2 x 7 x 23

Prime factors of 977 are 977

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

Given numbers are 780, 620, 644, 977

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

Apply this formula for all numbers.

Step1:

LCM(780, 620) = 24180

GCD(780, 620) = ( 780 x 620 ) / 24180

= 780 / 620

= 780

Step2:

LCM(20, 644) = 3220

GCD(20, 644) = ( 20 x 644 ) / 3220

= 20 / 644

= 20

Step3:

LCM(4, 977) = 3908

GCD(4, 977) = ( 4 x 977 ) / 3908

= 4 / 977

= 4

So, Greatest Common Divisor of 780, 620, 644, 977 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 133, 137, 719, 521
• GCD of 854, 519, 604, 615
• GCD of 703, 895, 682, 601
• GCD of 683, 605, 510, 781
• GCD of 442, 495, 348, 809

Given numbers are 780, 620, 644, 977
The greatest common divisor of numbers 780, 620, 644, 977 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 780, 620, 644, 977 is 1.

1. What is the GCD of 780, 620, 644, 977?

GCD of given numbers 780, 620, 644, 977 is 1

2. How to calculate the greatest common divisor of 780, 620, 644, 977?

We can find the highest common divisor of 780, 620, 644, 977 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 780, 620, 644, 977 i.e 1.

3. How can I use the GCD of 780, 620, 644, 977Calculator?

Out the numbers 780, 620, 644, 977 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.