LCM of 689, 891, 687
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 689, 891, 687 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 689, 891, 687. So, keep reading to learn more.
Given numbers are 689,891,687
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 689,891,687 is 140582871.
Find LCM of 689,891,687 with Prime Factorization
| 3 | 689, 891, 687 |
| 689, 297, 229 |
Multiply the prime numbers at the bottom and the left side.
3 x 689 x 297 x 229 = 140582871
Therefore, the lowest common multiple of 689,891,687 is 140582871.
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.
689 x 891 x 687 = 421748613
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.
689 : 1, 13, 53, 689
891 : 1, 3, 9, 11, 27, 33, 81, 99, 297, 891
687 : 1, 3, 229, 687
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 689,891,687, is 1.
Now, the common factors can be found like this.
689:13x 53
891:3x 3x 3x 3x 11
687:3x 229
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3 = 3
Therefore, the value for common factors is 3.
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 = 421748613/(1x3)
LCM = 421748613/3
LCM = 140582871
Thus, we can understand that the LCM of 689,891,687 is 140582871.
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FAQs on LCM of 689, 891, 687
1. What is the LCM of 689, 891, 687?
Answer: LCM of 689, 891, 687 is 140582871.
2. How to calculate the LCM of 689, 891, 687?
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 689, 891, 687.
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}.