LCM of 785, 720, 675, 687
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 785, 720, 675, 687 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 785, 720, 675, 687. So, keep reading to learn more.
Given numbers are 785,720,675,687
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 785,720,675,687 is 388292400.
Find LCM of 785,720,675,687 with Prime Factorization
| 3 | 785, 720, 675, 687 |
| 3 | 785, 240, 225, 229 |
| 5 | 785, 80, 75, 229 |
| 157, 16, 15, 229 |
Multiply the prime numbers at the bottom and the left side.
3 x 3 x 5 x 157 x 16 x 15 x 229 = 388292400
Therefore, the lowest common multiple of 785,720,675,687 is 388292400.
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.
785 x 720 x 675 x 687 = 262097370000
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.
785 : 1, 5, 157, 785
720 : 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720
675 : 1, 3, 5, 9, 15, 25, 27, 45, 75, 135, 225, 675
687 : 1, 3, 229, 687
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 785,720,675,687, is 1.
Now, the common factors can be found like this.
785:5x 157
720:2x 2x 2x 2x 3x 3x 5
675:3x 3x 3x 5x 5
687:3x 229
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 3x 3x 5x 5 = 675
Therefore, the value for common factors is 675.
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 = 262097370000/(1x675)
LCM = 262097370000/675
LCM = 388292400
Thus, we can understand that the LCM of 785,720,675,687 is 388292400.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 785, 720, 675, 687
1. What is the LCM of 785, 720, 675, 687?
Answer: LCM of 785, 720, 675, 687 is 388292400.
2. How to calculate the LCM of 785, 720, 675, 687?
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 785, 720, 675, 687.
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}.