LCM of 645, 428, 321, 678
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 645, 428, 321, 678 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 645, 428, 321, 678. So, keep reading to learn more.
Given numbers are 645,428,321,678
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 645,428,321,678 is 31194780.
Find LCM of 645,428,321,678 with Prime Factorization
| 2 | 645, 428, 321, 678 |
| 3 | 645, 214, 321, 339 |
| 107 | 215, 214, 107, 113 |
| 215, 2, 1, 113 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 107 x 215 x 2 x 1 x 113 = 31194780
Therefore, the lowest common multiple of 645,428,321,678 is 31194780.
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.
645 x 428 x 321 x 678 = 60081146280
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.
645 : 1, 3, 5, 15, 43, 129, 215, 645
428 : 1, 2, 4, 107, 214, 428
321 : 1, 3, 107, 321
678 : 1, 2, 3, 6, 113, 226, 339, 678
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 645,428,321,678, is 1.
Now, the common factors can be found like this.
645:3x 5x 43
428:2x 2x 107
321:3x 107
678:2x 3x 113
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 3x 107 = 1926
Therefore, the value for common factors is 1926.
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 = 60081146280/(1x1926)
LCM = 60081146280/1926
LCM = 31194780
Thus, we can understand that the LCM of 645,428,321,678 is 31194780.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 645, 428, 321, 678
1. What is the LCM of 645, 428, 321, 678?
Answer: LCM of 645, 428, 321, 678 is 31194780.
2. How to calculate the LCM of 645, 428, 321, 678?
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 645, 428, 321, 678.
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}.