LCM of 784, 705, 720, 631, 392
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 784, 705, 720, 631, 392 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, 705, 720, 631, 392. So, keep reading to learn more.
Given numbers are 784,705,720,631,392
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 784,705,720,631,392 is 1046298960.
Find LCM of 784,705,720,631,392 with Prime Factorization
| 2 | 784, 705, 720, 631, 392 |
| 2 | 392, 705, 360, 631, 196 |
| 2 | 98, 705, 180, 631, 196 |
| 2 | 49, 705, 90, 631, 98 |
| 3 | 49, 705, 45, 631, 49 |
| 5 | 49, 235, 15, 631, 49 |
| 7 | 49, 47, 3, 631, 49 |
| 7 | 7, 47, 3, 631, 7 |
| 1, 47, 3, 631, 1 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 2 x 3 x 5 x 7 x 7 x 1 x 47 x 3 x 631 x 1 = 1046298960
Therefore, the lowest common multiple of 784,705,720,631,392 is 1046298960.
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 705 x 720 x 631 x 392 = 98435806156800
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
705 : 1, 3, 5, 15, 47, 141, 235, 705
720 : 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720
631 : 1, 631
392 : 1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, 392
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 784,705,720,631,392, is 1.
Now, the common factors can be found like this.
784:2x 2x 2x 2x 7x 7
705:3x 5x 47
720:2x 2x 2x 2x 3x 3x 5
631:631
392:2x 2x 2x 7x 7
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 2x 2x 2x 2x 3x 5x 7x 7 = 94080
Therefore, the value for common factors is 94080.
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 = 98435806156800/(1x94080)
LCM = 98435806156800/94080
LCM = 1046298960
Thus, we can understand that the LCM of 784,705,720,631,392 is 1046298960.
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FAQs on LCM of 784, 705, 720, 631, 392
1. What is the LCM of 784, 705, 720, 631, 392?
Answer: LCM of 784, 705, 720, 631, 392 is 1046298960.
2. How to calculate the LCM of 784, 705, 720, 631, 392?
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, 705, 720, 631, 392.
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}.