LCM of 687, 209, 722, 990
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 687, 209, 722, 990 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, 209, 722, 990. So, keep reading to learn more.
Given numbers are 687,209,722,990
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 687,209,722,990 is 81842310.
Find LCM of 687,209,722,990 with Prime Factorization
| 2 | 687, 209, 722, 990 |
| 3 | 687, 209, 361, 495 |
| 11 | 229, 209, 361, 165 |
| 19 | 229, 19, 361, 15 |
| 229, 1, 19, 15 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 11 x 19 x 229 x 1 x 19 x 15 = 81842310
Therefore, the lowest common multiple of 687,209,722,990 is 81842310.
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 209 x 722 x 990 = 102630256740
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
209 : 1, 11, 19, 209
722 : 1, 2, 19, 38, 361, 722
990 : 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 687,209,722,990, is 1.
Now, the common factors can be found like this.
687:3x 229
209:11x 19
722:2x 19x 19
990:2x 3x 3x 5x 11
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 11x 19 = 1254
Therefore, the value for common factors is 1254.
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 = 102630256740/(1x1254)
LCM = 102630256740/1254
LCM = 81842310
Thus, we can understand that the LCM of 687,209,722,990 is 81842310.
LCM of two or more Numbers Calculation Examples
Here are some samples of LCM of two or more Numbers calculations.
FAQs on LCM of 687, 209, 722, 990
1. What is the LCM of 687, 209, 722, 990?
Answer: LCM of 687, 209, 722, 990 is 81842310.
2. How to calculate the LCM of 687, 209, 722, 990?
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, 209, 722, 990.
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}.