LCM of 687, 690, 661, 836
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 687, 690, 661, 836 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 687, 690, 661, 836. So, keep reading to learn more.
Given numbers are 687,690,661,836
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 687,690,661,836 is 43657846980.
Find LCM of 687,690,661,836 with Prime Factorization
| 2 | 687, 690, 661, 836 |
| 3 | 687, 345, 661, 418 |
| 229, 115, 661, 418 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 229 x 115 x 661 x 418 = 43657846980
Therefore, the lowest common multiple of 687,690,661,836 is 43657846980.
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.
687 x 690 x 661 x 836 = 261947081880
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.
687 : 1, 3, 229, 687
690 : 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690
661 : 1, 661
836 : 1, 2, 4, 11, 19, 22, 38, 44, 76, 209, 418, 836
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 687,690,661,836, is 1.
Now, the common factors can be found like this.
687:3x 229
690:2x 3x 5x 23
661:661
836:2x 2x 11x 19
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 3 = 6
Therefore, the value for common factors is 6.
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 = 261947081880/(1x6)
LCM = 261947081880/6
LCM = 43657846980
Thus, we can understand that the LCM of 687,690,661,836 is 43657846980.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 687, 690, 661, 836
1. What is the LCM of 687, 690, 661, 836?
Answer: LCM of 687, 690, 661, 836 is 43657846980.
2. How to calculate the LCM of 687, 690, 661, 836?
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 687, 690, 661, 836.
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}.