LCM of 805, 721, 891, 687
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 805, 721, 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 805, 721, 891, 687. So, keep reading to learn more.
Given numbers are 805,721,891,687
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 805,721,891,687 is 16917893685.
Find LCM of 805,721,891,687 with Prime Factorization
| 3 | 805, 721, 891, 687 |
| 7 | 805, 721, 297, 229 |
| 115, 103, 297, 229 |
Multiply the prime numbers at the bottom and the left side.
3 x 7 x 115 x 103 x 297 x 229 = 16917893685
Therefore, the lowest common multiple of 805,721,891,687 is 16917893685.
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.
805 x 721 x 891 x 687 = 355275767385
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.
805 : 1, 5, 7, 23, 35, 115, 161, 805
721 : 1, 7, 103, 721
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 805,721,891,687, is 1.
Now, the common factors can be found like this.
805:5x 7x 23
721:7x 103
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.
3x 7 = 21
Therefore, the value for common factors is 21.
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 = 355275767385/(1x21)
LCM = 355275767385/21
LCM = 16917893685
Thus, we can understand that the LCM of 805,721,891,687 is 16917893685.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 805, 721, 891, 687
1. What is the LCM of 805, 721, 891, 687?
Answer: LCM of 805, 721, 891, 687 is 16917893685.
2. How to calculate the LCM of 805, 721, 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 805, 721, 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}.