LCM of 784, 428, 686, 851
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 784, 428, 686, 851 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 784, 428, 686, 851. So, keep reading to learn more.
Given numbers are 784,428,686,851
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 784,428,686,851 is 499720816.
Find LCM of 784,428,686,851 with Prime Factorization
| 2 | 784, 428, 686, 851 |
| 2 | 392, 214, 343, 851 |
| 7 | 196, 107, 343, 851 |
| 7 | 28, 107, 49, 851 |
| 4, 107, 7, 851 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 7 x 7 x 4 x 107 x 7 x 851 = 499720816
Therefore, the lowest common multiple of 784,428,686,851 is 499720816.
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.
784 x 428 x 686 x 851 = 195890559872
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.
784 : 1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 98, 112, 196, 392, 784
428 : 1, 2, 4, 107, 214, 428
686 : 1, 2, 7, 14, 49, 98, 343, 686
851 : 1, 23, 37, 851
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 784,428,686,851, is 1.
Now, the common factors can be found like this.
784:2x 2x 2x 2x 7x 7
428:2x 2x 107
686:2x 7x 7x 7
851:23x 37
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 2x 7x 7 = 392
Therefore, the value for common factors is 392.
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 = 195890559872/(1x392)
LCM = 195890559872/392
LCM = 499720816
Thus, we can understand that the LCM of 784,428,686,851 is 499720816.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 784, 428, 686, 851
1. What is the LCM of 784, 428, 686, 851?
Answer: LCM of 784, 428, 686, 851 is 499720816.
2. How to calculate the LCM of 784, 428, 686, 851?
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 784, 428, 686, 851.
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}.