GCD of 821, 220, 428, 155 Calculator

Given Input numbers are 821, 220, 428, 155

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

Divisors of 821 :

The positive integer divisors of 821 that completely divides 821 are.

1, 821

Divisors of 220 :

The positive integer divisors of 220 that completely divides 220 are.

1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220

Divisors of 428 :

The positive integer divisors of 428 that completely divides 428 are.

1, 2, 4, 107, 214, 428

Divisors of 155 :

The positive integer divisors of 155 that completely divides 155 are.

1, 5, 31, 155

GCD of numbers is the greatest common divisor

So, the GCD (821, 220, 428, 155) = 1.

Given numbers are 821, 220, 428, 155

The list of prime factors of all numbers are

Prime factors of 821 are 821

Prime factors of 220 are 2 x 2 x 5 x 11

Prime factors of 428 are 2 x 2 x 107

Prime factors of 155 are 5 x 31

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

Given numbers are 821, 220, 428, 155

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

Apply this formula for all numbers.

Step1:

LCM(821, 220) = 180620

GCD(821, 220) = ( 821 x 220 ) / 180620

= 821 / 220

= 821

Step2:

LCM(1, 428) = 428

GCD(1, 428) = ( 1 x 428 ) / 428

= 1 / 428

= 1

Step3:

LCM(1, 155) = 155

GCD(1, 155) = ( 1 x 155 ) / 155

= 1 / 155

= 1

So, Greatest Common Divisor of 821, 220, 428, 155 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 817, 477, 579, 866
• GCD of 657, 399, 618, 156
• GCD of 421, 822, 376, 698
• GCD of 351, 824, 767, 700
• GCD of 454, 554, 800, 949

Given numbers are 821, 220, 428, 155
The greatest common divisor of numbers 821, 220, 428, 155 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 821, 220, 428, 155 is 1.

1. What is the GCD of 821, 220, 428, 155?

GCD of given numbers 821, 220, 428, 155 is 1

2. How to calculate the greatest common divisor of 821, 220, 428, 155?

We can find the highest common divisor of 821, 220, 428, 155 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 821, 220, 428, 155 i.e 1.

3. How can I use the GCD of 821, 220, 428, 155Calculator?

Out the numbers 821, 220, 428, 155 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.