LCM of 642, 321, 428
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 642, 321, 428 with the LCM of Two or More Numbers Calculator. Here we are teaching you two different methods through which you can calculate the LCM of 642, 321, 428. So, keep reading to learn more.
Given numbers are 642,321,428
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 642,321,428 is 1284.
Find LCM of 642,321,428 with Prime Factorization
| 2 | 642, 321, 428 |
| 3 | 321, 321, 214 |
| 107 | 107, 107, 214 |
| 1, 1, 2 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 107 x 1 x 1 x 2 = 1284
Therefore, the lowest common multiple of 642,321,428 is 1284.
LCM formula is LCM(a1, a2, an) = (a1 x a2 x an)/{GCF(a1 x a2 x an) x common factors}
Firstly, we have to find the product of all the numbers.
642 x 321 x 428 = 88203096
Then, let us find the GCF of these five numbers. To do so, we have to list down the factors for each number and choose the highest factor that is in all of the lists.
642 : 1, 2, 3, 6, 107, 214, 321, 642
321 : 1, 3, 107, 321
428 : 1, 2, 4, 107, 214, 428
107 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 642,321,428, is 107.
Now, the common factors can be found like this.
642:2x 3x 107
321:3x 107
428:2x 2x 107
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 3x 107 = 642
Therefore, the value for common factors is 642.
Now that we have all the elements of the formula, we can plug them in to calculate the LCM.
LCM(a1, a2, an) = (a1 x a2 x an)/{GCF(a1 x a2 x an) x common factors}
LCM = 88203096/(107x642)
LCM = 88203096/68694
LCM = 1284
Thus, we can understand that the LCM of 642,321,428 is 1284.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 642, 321, 428
1. What is the LCM of 642, 321, 428?
Answer: LCM of 642, 321, 428 is 1284.
2. How to calculate the LCM of 642, 321, 428?
The LCM can be found using two methods. You can either use the LCM formula or the prime factorization method to calculate the LCM of 642, 321, 428.
3. What is the LCM formula?
The LCM formula is LCM(a1, a2, an) = (a1 x a2 x an)/{GCF(a1 x a2 x an) x common factors}.