LCM of 924, 640, 720, 639
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 924, 640, 720, 639 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 924, 640, 720, 639. So, keep reading to learn more.
Given numbers are 924,640,720,639
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 924,640,720,639 is 31489920.
Find LCM of 924,640,720,639 with Prime Factorization
| 2 | 924, 640, 720, 639 |
| 2 | 462, 320, 360, 639 |
| 2 | 231, 160, 180, 639 |
| 2 | 231, 80, 90, 639 |
| 3 | 231, 40, 45, 639 |
| 3 | 77, 40, 15, 213 |
| 5 | 77, 40, 5, 71 |
| 77, 8, 1, 71 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 2 x 3 x 3 x 5 x 77 x 8 x 1 x 71 = 31489920
Therefore, the lowest common multiple of 924,640,720,639 is 31489920.
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.
924 x 640 x 720 x 639 = 272072908800
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.
924 : 1, 2, 3, 4, 6, 7, 11, 12, 14, 21, 22, 28, 33, 42, 44, 66, 77, 84, 132, 154, 231, 308, 462, 924
640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
720 : 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720
639 : 1, 3, 9, 71, 213, 639
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 924,640,720,639, is 1.
Now, the common factors can be found like this.
924:2x 2x 3x 7x 11
640:2x 2x 2x 2x 2x 2x 2x 5
720:2x 2x 2x 2x 3x 3x 5
639:3x 3x 71
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 3x 3x 3x 5 = 8640
Therefore, the value for common factors is 8640.
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 = 272072908800/(1x8640)
LCM = 272072908800/8640
LCM = 31489920
Thus, we can understand that the LCM of 924,640,720,639 is 31489920.
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FAQs on LCM of 924, 640, 720, 639
1. What is the LCM of 924, 640, 720, 639?
Answer: LCM of 924, 640, 720, 639 is 31489920.
2. How to calculate the LCM of 924, 640, 720, 639?
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 924, 640, 720, 639.
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}.