LCM of 420, 904, 787, 784
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 420, 904, 787, 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 420, 904, 787, 784. So, keep reading to learn more.
Given numbers are 420,904,787,784
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 420,904,787,784 is 1045828560.
Find LCM of 420,904,787,784 with Prime Factorization
| 2 | 420, 904, 787, 784 |
| 2 | 210, 452, 787, 392 |
| 2 | 105, 226, 787, 196 |
| 7 | 105, 113, 787, 98 |
| 15, 113, 787, 14 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 7 x 15 x 113 x 787 x 14 = 1045828560
Therefore, the lowest common multiple of 420,904,787,784 is 1045828560.
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.
420 x 904 x 787 x 784 = 234265597440
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.
420 : 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420
904 : 1, 2, 4, 8, 113, 226, 452, 904
787 : 1, 787
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 420,904,787,784, is 1.
Now, the common factors can be found like this.
420:2x 2x 3x 5x 7
904:2x 2x 2x 113
787:787
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 2x 2x 7 = 224
Therefore, the value for common factors is 224.
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 = 234265597440/(1x224)
LCM = 234265597440/224
LCM = 1045828560
Thus, we can understand that the LCM of 420,904,787,784 is 1045828560.
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FAQs on LCM of 420, 904, 787, 784
1. What is the LCM of 420, 904, 787, 784?
Answer: LCM of 420, 904, 787, 784 is 1045828560.
2. How to calculate the LCM of 420, 904, 787, 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 420, 904, 787, 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}.