LCM of 786, 840, 904, 861
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 786, 840, 904, 861 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 786, 840, 904, 861. So, keep reading to learn more.
Given numbers are 786,840,904,861
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 786,840,904,861 is 509815320.
Find LCM of 786,840,904,861 with Prime Factorization
| 2 | 786, 840, 904, 861 |
| 2 | 393, 420, 452, 861 |
| 2 | 393, 210, 226, 861 |
| 3 | 393, 105, 113, 861 |
| 7 | 131, 35, 113, 287 |
| 131, 5, 113, 41 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 3 x 7 x 131 x 5 x 113 x 41 = 509815320
Therefore, the lowest common multiple of 786,840,904,861 is 509815320.
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.
786 x 840 x 904 x 861 = 513893842560
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.
786 : 1, 2, 3, 6, 131, 262, 393, 786
840 : 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840
904 : 1, 2, 4, 8, 113, 226, 452, 904
861 : 1, 3, 7, 21, 41, 123, 287, 861
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 786,840,904,861, is 1.
Now, the common factors can be found like this.
786:2x 3x 131
840:2x 2x 2x 3x 5x 7
904:2x 2x 2x 113
861:3x 7x 41
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 3x 3x 7 = 1008
Therefore, the value for common factors is 1008.
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 = 513893842560/(1x1008)
LCM = 513893842560/1008
LCM = 509815320
Thus, we can understand that the LCM of 786,840,904,861 is 509815320.
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FAQs on LCM of 786, 840, 904, 861
1. What is the LCM of 786, 840, 904, 861?
Answer: LCM of 786, 840, 904, 861 is 509815320.
2. How to calculate the LCM of 786, 840, 904, 861?
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 786, 840, 904, 861.
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}.