LCM of 428, 668, 645, 985
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 428, 668, 645, 985 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 428, 668, 645, 985. So, keep reading to learn more.
Given numbers are 428,668,645,985
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 428,668,645,985 is 9082097940.
Find LCM of 428,668,645,985 with Prime Factorization
| 2 | 428, 668, 645, 985 |
| 2 | 214, 334, 645, 985 |
| 5 | 107, 167, 645, 985 |
| 107, 167, 129, 197 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 5 x 107 x 167 x 129 x 197 = 9082097940
Therefore, the lowest common multiple of 428,668,645,985 is 9082097940.
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.
428 x 668 x 645 x 985 = 181641958800
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.
428 : 1, 2, 4, 107, 214, 428
668 : 1, 2, 4, 167, 334, 668
645 : 1, 3, 5, 15, 43, 129, 215, 645
985 : 1, 5, 197, 985
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 428,668,645,985, is 1.
Now, the common factors can be found like this.
428:2x 2x 107
668:2x 2x 167
645:3x 5x 43
985:5x 197
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 2x 5 = 20
Therefore, the value for common factors is 20.
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 = 181641958800/(1x20)
LCM = 181641958800/20
LCM = 9082097940
Thus, we can understand that the LCM of 428,668,645,985 is 9082097940.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 428, 668, 645, 985
1. What is the LCM of 428, 668, 645, 985?
Answer: LCM of 428, 668, 645, 985 is 9082097940.
2. How to calculate the LCM of 428, 668, 645, 985?
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 428, 668, 645, 985.
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}.