LCM of 646, 988, 160, 640
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 646, 988, 160, 640 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, 988, 160, 640. So, keep reading to learn more.
Given numbers are 646,988,160,640
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 646,988,160,640 is 2687360.
Find LCM of 646,988,160,640 with Prime Factorization
| 2 | 646, 988, 160, 640 |
| 2 | 323, 494, 80, 320 |
| 2 | 323, 247, 40, 160 |
| 2 | 323, 247, 20, 80 |
| 2 | 323, 247, 10, 40 |
| 5 | 323, 247, 5, 20 |
| 19 | 323, 247, 1, 4 |
| 17, 13, 1, 4 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 2 x 2 x 5 x 19 x 17 x 13 x 1 x 4 = 2687360
Therefore, the lowest common multiple of 646,988,160,640 is 2687360.
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 988 x 160 x 640 = 65356595200
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
988 : 1, 2, 4, 13, 19, 26, 38, 52, 76, 247, 494, 988
160 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160
640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 646,988,160,640, is 2.
Now, the common factors can be found like this.
646:2x 17x 19
988:2x 2x 13x 19
160:2x 2x 2x 2x 2x 5
640:2x 2x 2x 2x 2x 2x 2x 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 2x 2x 2x 2x 2x 2x 5x 19 = 12160
Therefore, the value for common factors is 12160.
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 = 65356595200/(2x12160)
LCM = 65356595200/24320
LCM = 2687360
Thus, we can understand that the LCM of 646,988,160,640 is 2687360.
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FAQs on LCM of 646, 988, 160, 640
1. What is the LCM of 646, 988, 160, 640?
Answer: LCM of 646, 988, 160, 640 is 2687360.
2. How to calculate the LCM of 646, 988, 160, 640?
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, 988, 160, 640.
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}.