LCM of 642, 856, 900, 218
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 642, 856, 900, 218 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 642, 856, 900, 218. So, keep reading to learn more.
Given numbers are 642,856,900,218
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 642,856,900,218 is 20993400.
Find LCM of 642,856,900,218 with Prime Factorization
| 2 | 642, 856, 900, 218 |
| 2 | 321, 428, 450, 109 |
| 3 | 321, 214, 225, 109 |
| 107 | 107, 214, 75, 109 |
| 1, 2, 75, 109 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 107 x 1 x 2 x 75 x 109 = 20993400
Therefore, the lowest common multiple of 642,856,900,218 is 20993400.
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.
642 x 856 x 900 x 218 = 107822102400
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.
642 : 1, 2, 3, 6, 107, 214, 321, 642
856 : 1, 2, 4, 8, 107, 214, 428, 856
900 : 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 36, 45, 50, 60, 75, 90, 100, 150, 180, 225, 300, 450, 900
218 : 1, 2, 109, 218
2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 642,856,900,218, is 2.
Now, the common factors can be found like this.
642:2x 3x 107
856:2x 2x 2x 107
900:2x 2x 3x 3x 5x 5
218:2x 109
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 2x 2x 3x 107 = 2568
Therefore, the value for common factors is 2568.
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 = 107822102400/(2x2568)
LCM = 107822102400/5136
LCM = 20993400
Thus, we can understand that the LCM of 642,856,900,218 is 20993400.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 642, 856, 900, 218
1. What is the LCM of 642, 856, 900, 218?
Answer: LCM of 642, 856, 900, 218 is 20993400.
2. How to calculate the LCM of 642, 856, 900, 218?
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 642, 856, 900, 218.
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}.