LCM of 643, 456, 825, 784
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 643, 456, 825, 784 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 643, 456, 825, 784. So, keep reading to learn more.
Given numbers are 643,456,825,784
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 643,456,825,784 is 7901955600.
Find LCM of 643,456,825,784 with Prime Factorization
| 2 | 643, 456, 825, 784 |
| 2 | 643, 228, 825, 392 |
| 2 | 643, 114, 825, 196 |
| 3 | 643, 57, 825, 98 |
| 643, 19, 275, 98 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 3 x 643 x 19 x 275 x 98 = 7901955600
Therefore, the lowest common multiple of 643,456,825,784 is 7901955600.
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.
643 x 456 x 825 x 784 = 189646934400
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.
643 : 1, 643
456 : 1, 2, 3, 4, 6, 8, 12, 19, 24, 38, 57, 76, 114, 152, 228, 456
825 : 1, 3, 5, 11, 15, 25, 33, 55, 75, 165, 275, 825
784 : 1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 98, 112, 196, 392, 784
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 643,456,825,784, is 1.
Now, the common factors can be found like this.
643:643
456:2x 2x 2x 3x 19
825:3x 5x 5x 11
784:2x 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 3 = 24
Therefore, the value for common factors is 24.
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 = 189646934400/(1x24)
LCM = 189646934400/24
LCM = 7901955600
Thus, we can understand that the LCM of 643,456,825,784 is 7901955600.
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FAQs on LCM of 643, 456, 825, 784
1. What is the LCM of 643, 456, 825, 784?
Answer: LCM of 643, 456, 825, 784 is 7901955600.
2. How to calculate the LCM of 643, 456, 825, 784?
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 643, 456, 825, 784.
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}.