LCM of 686, 660, 846, 638
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 686, 660, 846, 638 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 686, 660, 846, 638. So, keep reading to learn more.
Given numbers are 686,660,846,638
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 686,660,846,638 is 925667820.
Find LCM of 686,660,846,638 with Prime Factorization
| 2 | 686, 660, 846, 638 |
| 3 | 343, 330, 423, 319 |
| 11 | 343, 110, 141, 319 |
| 343, 10, 141, 29 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 11 x 343 x 10 x 141 x 29 = 925667820
Therefore, the lowest common multiple of 686,660,846,638 is 925667820.
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.
686 x 660 x 846 x 638 = 244376304480
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.
686 : 1, 2, 7, 14, 49, 98, 343, 686
660 : 1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 165, 220, 330, 660
846 : 1, 2, 3, 6, 9, 18, 47, 94, 141, 282, 423, 846
638 : 1, 2, 11, 22, 29, 58, 319, 638
2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 686,660,846,638, is 2.
Now, the common factors can be found like this.
686:2x 7x 7x 7
660:2x 2x 3x 5x 11
846:2x 3x 3x 47
638:2x 11x 29
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 3x 11 = 132
Therefore, the value for common factors is 132.
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 = 244376304480/(2x132)
LCM = 244376304480/264
LCM = 925667820
Thus, we can understand that the LCM of 686,660,846,638 is 925667820.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 686, 660, 846, 638
1. What is the LCM of 686, 660, 846, 638?
Answer: LCM of 686, 660, 846, 638 is 925667820.
2. How to calculate the LCM of 686, 660, 846, 638?
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 686, 660, 846, 638.
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}.