LCM of 684, 783, 646, 391
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 684, 783, 646, 391 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 684, 783, 646, 391. So, keep reading to learn more.
Given numbers are 684,783,646,391
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 684,783,646,391 is 23267628.
Find LCM of 684,783,646,391 with Prime Factorization
| 2 | 684, 783, 646, 391 |
| 3 | 342, 783, 323, 391 |
| 3 | 114, 261, 323, 391 |
| 17 | 38, 87, 323, 391 |
| 19 | 38, 87, 19, 23 |
| 2, 87, 1, 23 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 3 x 17 x 19 x 2 x 87 x 1 x 23 = 23267628
Therefore, the lowest common multiple of 684,783,646,391 is 23267628.
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.
684 x 783 x 646 x 391 = 135277989192
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.
684 : 1, 2, 3, 4, 6, 9, 12, 18, 19, 36, 38, 57, 76, 114, 171, 228, 342, 684
783 : 1, 3, 9, 27, 29, 87, 261, 783
646 : 1, 2, 17, 19, 34, 38, 323, 646
391 : 1, 17, 23, 391
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 684,783,646,391, is 1.
Now, the common factors can be found like this.
684:2x 2x 3x 3x 19
783:3x 3x 3x 29
646:2x 17x 19
391:17x 23
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 17x 19 = 5814
Therefore, the value for common factors is 5814.
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 = 135277989192/(1x5814)
LCM = 135277989192/5814
LCM = 23267628
Thus, we can understand that the LCM of 684,783,646,391 is 23267628.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 684, 783, 646, 391
1. What is the LCM of 684, 783, 646, 391?
Answer: LCM of 684, 783, 646, 391 is 23267628.
2. How to calculate the LCM of 684, 783, 646, 391?
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 684, 783, 646, 391.
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}.