LCM of 512, 821, 690, 640
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 512, 821, 690, 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 512, 821, 690, 640. So, keep reading to learn more.
Given numbers are 512,821,690,640
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 512,821,690,640 is 145021440.
Find LCM of 512,821,690,640 with Prime Factorization
| 2 | 512, 821, 690, 640 |
| 2 | 256, 821, 345, 320 |
| 2 | 128, 821, 345, 160 |
| 2 | 64, 821, 345, 80 |
| 2 | 32, 821, 345, 40 |
| 2 | 16, 821, 345, 20 |
| 2 | 8, 821, 345, 10 |
| 5 | 4, 821, 345, 5 |
| 4, 821, 69, 1 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 2 x 2 x 2 x 2 x 5 x 4 x 821 x 69 x 1 = 145021440
Therefore, the lowest common multiple of 512,821,690,640 is 145021440.
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.
512 x 821 x 690 x 640 = 185627443200
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.
512 : 1, 2, 4, 8, 16, 32, 64, 128, 256, 512
821 : 1, 821
690 : 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690
640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 512,821,690,640, is 1.
Now, the common factors can be found like this.
512:2x 2x 2x 2x 2x 2x 2x 2x 2
821:821
690:2x 3x 5x 23
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 2x 5 = 1280
Therefore, the value for common factors is 1280.
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 = 185627443200/(1x1280)
LCM = 185627443200/1280
LCM = 145021440
Thus, we can understand that the LCM of 512,821,690,640 is 145021440.
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FAQs on LCM of 512, 821, 690, 640
1. What is the LCM of 512, 821, 690, 640?
Answer: LCM of 512, 821, 690, 640 is 145021440.
2. How to calculate the LCM of 512, 821, 690, 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 512, 821, 690, 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}.