LCM of 864, 638, 972, 640
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 864, 638, 972, 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 864, 638, 972, 640. So, keep reading to learn more.
Given numbers are 864,638,972,640
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 864,638,972,640 is 49610880.
Find LCM of 864,638,972,640 with Prime Factorization
| 2 | 864, 638, 972, 640 |
| 2 | 432, 319, 486, 320 |
| 2 | 216, 319, 243, 160 |
| 2 | 108, 319, 243, 80 |
| 2 | 54, 319, 243, 40 |
| 3 | 27, 319, 243, 20 |
| 3 | 9, 319, 81, 20 |
| 3 | 3, 319, 27, 20 |
| 1, 319, 9, 20 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 1 x 319 x 9 x 20 = 49610880
Therefore, the lowest common multiple of 864,638,972,640 is 49610880.
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.
864 x 638 x 972 x 640 = 342910402560
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.
864 : 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 32, 36, 48, 54, 72, 96, 108, 144, 216, 288, 432, 864
638 : 1, 2, 11, 22, 29, 58, 319, 638
972 : 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, 243, 324, 486, 972
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 864,638,972,640, is 2.
Now, the common factors can be found like this.
864:2x 2x 2x 2x 2x 3x 3x 3
638:2x 11x 29
972:2x 2x 3x 3x 3x 3x 3
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 3x 3x 3 = 3456
Therefore, the value for common factors is 3456.
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 = 342910402560/(2x3456)
LCM = 342910402560/6912
LCM = 49610880
Thus, we can understand that the LCM of 864,638,972,640 is 49610880.
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FAQs on LCM of 864, 638, 972, 640
1. What is the LCM of 864, 638, 972, 640?
Answer: LCM of 864, 638, 972, 640 is 49610880.
2. How to calculate the LCM of 864, 638, 972, 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 864, 638, 972, 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}.