LCM of 646, 685, 120, 238
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 646, 685, 120, 238 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 646, 685, 120, 238. So, keep reading to learn more.
Given numbers are 646,685,120,238
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 646,685,120,238 is 37170840.
Find LCM of 646,685,120,238 with Prime Factorization
| 2 | 646, 685, 120, 238 |
| 5 | 323, 685, 60, 119 |
| 17 | 323, 137, 12, 119 |
| 19, 137, 12, 7 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 17 x 19 x 137 x 12 x 7 = 37170840
Therefore, the lowest common multiple of 646,685,120,238 is 37170840.
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.
646 x 685 x 120 x 238 = 12638085600
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.
646 : 1, 2, 17, 19, 34, 38, 323, 646
685 : 1, 5, 137, 685
120 : 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120
238 : 1, 2, 7, 14, 17, 34, 119, 238
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 646,685,120,238, is 1.
Now, the common factors can be found like this.
646:2x 17x 19
685:5x 137
120:2x 2x 2x 3x 5
238:2x 7x 17
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 5x 17 = 340
Therefore, the value for common factors is 340.
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 = 12638085600/(1x340)
LCM = 12638085600/340
LCM = 37170840
Thus, we can understand that the LCM of 646,685,120,238 is 37170840.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 646, 685, 120, 238
1. What is the LCM of 646, 685, 120, 238?
Answer: LCM of 646, 685, 120, 238 is 37170840.
2. How to calculate the LCM of 646, 685, 120, 238?
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 646, 685, 120, 238.
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}.