LCM of 781, 217, 847, 687
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 781, 217, 847, 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 781, 217, 847, 687. So, keep reading to learn more.
Given numbers are 781,217,847,687
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 781,217,847,687 is 1280737689.
Find LCM of 781,217,847,687 with Prime Factorization
| 7 | 781, 217, 847, 687 |
| 11 | 781, 31, 121, 687 |
| 71, 31, 11, 687 |
Multiply the prime numbers at the bottom and the left side.
7 x 11 x 71 x 31 x 11 x 687 = 1280737689
Therefore, the lowest common multiple of 781,217,847,687 is 1280737689.
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.
781 x 217 x 847 x 687 = 98616802053
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.
781 : 1, 11, 71, 781
217 : 1, 7, 31, 217
847 : 1, 7, 11, 77, 121, 847
687 : 1, 3, 229, 687
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 781,217,847,687, is 1.
Now, the common factors can be found like this.
781:11x 71
217:7x 31
847:7x 11x 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.
7x 11 = 77
Therefore, the value for common factors is 77.
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 = 98616802053/(1x77)
LCM = 98616802053/77
LCM = 1280737689
Thus, we can understand that the LCM of 781,217,847,687 is 1280737689.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 781, 217, 847, 687
1. What is the LCM of 781, 217, 847, 687?
Answer: LCM of 781, 217, 847, 687 is 1280737689.
2. How to calculate the LCM of 781, 217, 847, 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 781, 217, 847, 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}.