GCD of 438, 620, 644 Calculator

Given Input numbers are 438, 620, 644

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

Divisors of 438 :

The positive integer divisors of 438 that completely divides 438 are.

1, 2, 3, 6, 73, 146, 219, 438

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

GCD of numbers is the greatest common divisor

So, the GCD (438, 620, 644) = 2.

Given numbers are 438, 620, 644

The list of prime factors of all numbers are

Prime factors of 438 are 2 x 3 x 73

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

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

The highest common occurrence is 2¹

Therefore, GCD of 438, 620, 644 is 2.

Given numbers are 438, 620, 644

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

Apply this formula for all numbers.

Step1:

LCM(438, 620) = 135780

GCD(438, 620) = ( 438 x 620 ) / 135780

= 438 / 620

= 438

Step2:

LCM(2, 644) = 644

GCD(2, 644) = ( 2 x 644 ) / 644

= 2 / 644

= 2

So, Greatest Common Divisor of 438, 620, 644 is 2

Here are some samples of GCD of Numbers calculations.

• GCD of 881, 401, 649
• GCD of 884, 964, 531
• GCD of 745, 382, 836
• GCD of 895, 899, 760
• GCD of 197, 105, 897

Given numbers are 438, 620, 644
The greatest common divisor of numbers 438, 620, 644 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 438, 620, 644 is 2.

1. What is the GCD of 438, 620, 644?

GCD of given numbers 438, 620, 644 is 2

2. How to calculate the greatest common divisor of 438, 620, 644?

We can find the highest common divisor of 438, 620, 644 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 438, 620, 644 i.e 2.

3. How can I use the GCD of 438, 620, 644Calculator?

Out the numbers 438, 620, 644 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.