LCM of 399, 642, 645, 172
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 399, 642, 645, 172 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 399, 642, 645, 172. So, keep reading to learn more.
Given numbers are 399,642,645,172
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 399,642,645,172 is 36715980.
Find LCM of 399,642,645,172 with Prime Factorization
| 2 | 399, 642, 645, 172 |
| 3 | 399, 321, 645, 86 |
| 43 | 133, 107, 215, 86 |
| 133, 107, 5, 2 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 43 x 133 x 107 x 5 x 2 = 36715980
Therefore, the lowest common multiple of 399,642,645,172 is 36715980.
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.
399 x 642 x 645 x 172 = 28418168520
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.
399 : 1, 3, 7, 19, 21, 57, 133, 399
642 : 1, 2, 3, 6, 107, 214, 321, 642
645 : 1, 3, 5, 15, 43, 129, 215, 645
172 : 1, 2, 4, 43, 86, 172
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 399,642,645,172, is 1.
Now, the common factors can be found like this.
399:3x 7x 19
642:2x 3x 107
645:3x 5x 43
172:2x 2x 43
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 43 = 774
Therefore, the value for common factors is 774.
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 = 28418168520/(1x774)
LCM = 28418168520/774
LCM = 36715980
Thus, we can understand that the LCM of 399,642,645,172 is 36715980.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 399, 642, 645, 172
1. What is the LCM of 399, 642, 645, 172?
Answer: LCM of 399, 642, 645, 172 is 36715980.
2. How to calculate the LCM of 399, 642, 645, 172?
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 399, 642, 645, 172.
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}.