LCM of 640, 670, 691, 240
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 640, 670, 691, 240 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 640, 670, 691, 240. So, keep reading to learn more.
Given numbers are 640,670,691,240
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 640,670,691,240 is 88890240.
Find LCM of 640,670,691,240 with Prime Factorization
| 2 | 640, 670, 691, 240 |
| 2 | 320, 335, 691, 120 |
| 2 | 160, 335, 691, 60 |
| 2 | 80, 335, 691, 30 |
| 5 | 40, 335, 691, 15 |
| 8, 67, 691, 3 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 2 x 5 x 8 x 67 x 691 x 3 = 88890240
Therefore, the lowest common multiple of 640,670,691,240 is 88890240.
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.
640 x 670 x 691 x 240 = 71112192000
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.
640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
670 : 1, 2, 5, 10, 67, 134, 335, 670
691 : 1, 691
240 : 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 640,670,691,240, is 1.
Now, the common factors can be found like this.
640:2x 2x 2x 2x 2x 2x 2x 5
670:2x 5x 67
691:691
240:2x 2x 2x 2x 3x 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 5x 5 = 800
Therefore, the value for common factors is 800.
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 = 71112192000/(1x800)
LCM = 71112192000/800
LCM = 88890240
Thus, we can understand that the LCM of 640,670,691,240 is 88890240.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 640, 670, 691, 240
1. What is the LCM of 640, 670, 691, 240?
Answer: LCM of 640, 670, 691, 240 is 88890240.
2. How to calculate the LCM of 640, 670, 691, 240?
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 640, 670, 691, 240.
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}.