LCM of 685, 920, 640, 985, 391
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 685, 920, 640, 985, 391 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 685, 920, 640, 985, 391. So, keep reading to learn more.
Given numbers are 685,920,640,985,391
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 685,920,640,985,391 is 6753727360.
Find LCM of 685,920,640,985,391 with Prime Factorization
| 2 | 685, 920, 640, 985, 391 |
| 2 | 685, 460, 320, 985, 391 |
| 2 | 685, 230, 160, 985, 391 |
| 5 | 685, 115, 80, 985, 391 |
| 23 | 137, 23, 16, 197, 391 |
| 137, 1, 16, 197, 17 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 5 x 23 x 137 x 1 x 16 x 197 x 17 = 6753727360
Therefore, the lowest common multiple of 685,920,640,985,391 is 6753727360.
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.
685 x 920 x 640 x 985 x 391 = 155335729280000
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.
685 : 1, 5, 137, 685
920 : 1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 184, 230, 460, 920
640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
985 : 1, 5, 197, 985
391 : 1, 17, 23, 391
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 685,920,640,985,391, is 1.
Now, the common factors can be found like this.
685:5x 137
920:2x 2x 2x 5x 23
640:2x 2x 2x 2x 2x 2x 2x 5
985:5x 197
391:17x 23
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 5x 5x 5x 23 = 23000
Therefore, the value for common factors is 23000.
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 = 155335729280000/(1x23000)
LCM = 155335729280000/23000
LCM = 6753727360
Thus, we can understand that the LCM of 685,920,640,985,391 is 6753727360.
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FAQs on LCM of 685, 920, 640, 985, 391
1. What is the LCM of 685, 920, 640, 985, 391?
Answer: LCM of 685, 920, 640, 985, 391 is 6753727360.
2. How to calculate the LCM of 685, 920, 640, 985, 391?
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 685, 920, 640, 985, 391.
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}.