GCD of 399, 129, 420, 620 Calculator

Given Input numbers are 399, 129, 420, 620

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

Divisors of 399 :

The positive integer divisors of 399 that completely divides 399 are.

1, 3, 7, 19, 21, 57, 133, 399

Divisors of 129 :

The positive integer divisors of 129 that completely divides 129 are.

1, 3, 43, 129

Divisors of 420 :

The positive integer divisors of 420 that completely divides 420 are.

1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420

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

GCD of numbers is the greatest common divisor

So, the GCD (399, 129, 420, 620) = 1.

Given numbers are 399, 129, 420, 620

The list of prime factors of all numbers are

Prime factors of 399 are 3 x 7 x 19

Prime factors of 129 are 3 x 43

Prime factors of 420 are 2 x 2 x 3 x 5 x 7

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

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

Given numbers are 399, 129, 420, 620

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

Apply this formula for all numbers.

Step1:

LCM(399, 129) = 17157

GCD(399, 129) = ( 399 x 129 ) / 17157

= 399 / 129

= 399

Step2:

LCM(3, 420) = 420

GCD(3, 420) = ( 3 x 420 ) / 420

= 3 / 420

= 3

Step3:

LCM(3, 620) = 1860

GCD(3, 620) = ( 3 x 620 ) / 1860

= 3 / 620

= 3

So, Greatest Common Divisor of 399, 129, 420, 620 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 283, 456, 547, 901
• GCD of 950, 922, 843, 351
• GCD of 921, 874, 343, 226
• GCD of 322, 762, 536, 232
• GCD of 455, 630, 699, 424

Given numbers are 399, 129, 420, 620
The greatest common divisor of numbers 399, 129, 420, 620 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 399, 129, 420, 620 is 1.

1. What is the GCD of 399, 129, 420, 620?

GCD of given numbers 399, 129, 420, 620 is 1

2. How to calculate the greatest common divisor of 399, 129, 420, 620?

We can find the highest common divisor of 399, 129, 420, 620 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 399, 129, 420, 620 i.e 1.

3. How can I use the GCD of 399, 129, 420, 620Calculator?

Out the numbers 399, 129, 420, 620 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.