LCM of 78, 69, 56, 987
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 78, 69, 56, 987 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 78, 69, 56, 987. So, keep reading to learn more.
Given numbers are 78,69,56,987
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 78,69,56,987 is 2360904.
Find LCM of 78,69,56,987 with Prime Factorization
| 2 | 78, 69, 56, 987 |
| 3 | 39, 69, 28, 987 |
| 7 | 13, 23, 28, 329 |
| 13, 23, 4, 47 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 7 x 13 x 23 x 4 x 47 = 2360904
Therefore, the lowest common multiple of 78,69,56,987 is 2360904.
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.
78 x 69 x 56 x 987 = 297473904
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.
78 : 1, 2, 3, 6, 13, 26, 39, 78
69 : 1, 3, 23, 69
56 : 1, 2, 4, 7, 8, 14, 28, 56
987 : 1, 3, 7, 21, 47, 141, 329, 987
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 78,69,56,987, is 1.
Now, the common factors can be found like this.
78:2x 3x 13
69:3x 23
56:2x 2x 2x 7
987:3x 7x 47
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 3x 3x 7 = 126
Therefore, the value for common factors is 126.
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 = 297473904/(1x126)
LCM = 297473904/126
LCM = 2360904
Thus, we can understand that the LCM of 78,69,56,987 is 2360904.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 78, 69, 56, 987
1. What is the LCM of 78, 69, 56, 987?
Answer: LCM of 78, 69, 56, 987 is 2360904.
2. How to calculate the LCM of 78, 69, 56, 987?
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 78, 69, 56, 987.
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}.