GCD of 820, 221, 421, 129 Calculator

Given Input numbers are 820, 221, 421, 129

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

Divisors of 820 :

The positive integer divisors of 820 that completely divides 820 are.

1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820

Divisors of 221 :

The positive integer divisors of 221 that completely divides 221 are.

1, 13, 17, 221

Divisors of 421 :

The positive integer divisors of 421 that completely divides 421 are.

1, 421

Divisors of 129 :

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

1, 3, 43, 129

GCD of numbers is the greatest common divisor

So, the GCD (820, 221, 421, 129) = 1.

Given numbers are 820, 221, 421, 129

The list of prime factors of all numbers are

Prime factors of 820 are 2 x 2 x 5 x 41

Prime factors of 221 are 13 x 17

Prime factors of 421 are 421

Prime factors of 129 are 3 x 43

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

Given numbers are 820, 221, 421, 129

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

Apply this formula for all numbers.

Step1:

LCM(820, 221) = 181220

GCD(820, 221) = ( 820 x 221 ) / 181220

= 820 / 221

= 820

Step2:

LCM(1, 421) = 421

GCD(1, 421) = ( 1 x 421 ) / 421

= 1 / 421

= 1

Step3:

LCM(1, 129) = 129

GCD(1, 129) = ( 1 x 129 ) / 129

= 1 / 129

= 1

So, Greatest Common Divisor of 820, 221, 421, 129 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 202, 958, 831, 216
• GCD of 265, 420, 368, 781
• GCD of 708, 199, 654, 715
• GCD of 911, 540, 132, 355
• GCD of 383, 338, 410, 721

Given numbers are 820, 221, 421, 129
The greatest common divisor of numbers 820, 221, 421, 129 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 820, 221, 421, 129 is 1.

1. What is the GCD of 820, 221, 421, 129?

GCD of given numbers 820, 221, 421, 129 is 1

2. How to calculate the greatest common divisor of 820, 221, 421, 129?

We can find the highest common divisor of 820, 221, 421, 129 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 820, 221, 421, 129 i.e 1.

3. How can I use the GCD of 820, 221, 421, 129Calculator?

Out the numbers 820, 221, 421, 129 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.