LCM of 668, 21, 810
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 668, 21, 810 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 668, 21, 810. So, keep reading to learn more.
Given numbers are 668,21,810
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 668,21,810 is 1893780.
Find LCM of 668,21,810 with Prime Factorization
| 2 | 668, 21, 810 |
| 3 | 334, 21, 405 |
| 334, 7, 135 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 334 x 7 x 135 = 1893780
Therefore, the lowest common multiple of 668,21,810 is 1893780.
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.
668 x 21 x 810 = 11362680
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.
668 : 1, 2, 4, 167, 334, 668
21 : 1, 3, 7, 21
810 : 1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 270, 405, 810
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 668,21,810, is 1.
Now, the common factors can be found like this.
668:2x 2x 167
21:3x 7
810:2x 3x 3x 3x 3x 5
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 = 11362680/(1x6)
LCM = 11362680/6
LCM = 1893780
Thus, we can understand that the LCM of 668,21,810 is 1893780.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 668, 21, 810
1. What is the LCM of 668, 21, 810?
Answer: LCM of 668, 21, 810 is 1893780.
2. How to calculate the LCM of 668, 21, 810?
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 668, 21, 810.
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}.