LCM of 688, 128, 840, 664, 842
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 688, 128, 840, 664, 842 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 688, 128, 840, 664, 842. So, keep reading to learn more.
Given numbers are 688,128,840,664,842
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 688,128,840,664,842 is 20194258560.
Find LCM of 688,128,840,664,842 with Prime Factorization
| 2 | 688, 128, 840, 664, 842 |
| 2 | 344, 64, 420, 332, 421 |
| 2 | 172, 32, 210, 166, 421 |
| 2 | 86, 16, 105, 83, 421 |
| 43, 8, 105, 83, 421 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 2 x 43 x 8 x 105 x 83 x 421 = 20194258560
Therefore, the lowest common multiple of 688,128,840,664,842 is 20194258560.
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.
688 x 128 x 840 x 664 x 842 = 41357841530880
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.
688 : 1, 2, 4, 8, 16, 43, 86, 172, 344, 688
128 : 1, 2, 4, 8, 16, 32, 64, 128
840 : 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840
664 : 1, 2, 4, 8, 83, 166, 332, 664
842 : 1, 2, 421, 842
2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 688,128,840,664,842, is 2.
Now, the common factors can be found like this.
688:2x 2x 2x 2x 43
128:2x 2x 2x 2x 2x 2x 2
840:2x 2x 2x 3x 5x 7
664:2x 2x 2x 83
842:2x 421
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 2x 2 = 1024
Therefore, the value for common factors is 1024.
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 = 41357841530880/(2x1024)
LCM = 41357841530880/2048
LCM = 20194258560
Thus, we can understand that the LCM of 688,128,840,664,842 is 20194258560.
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FAQs on LCM of 688, 128, 840, 664, 842
1. What is the LCM of 688, 128, 840, 664, 842?
Answer: LCM of 688, 128, 840, 664, 842 is 20194258560.
2. How to calculate the LCM of 688, 128, 840, 664, 842?
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 688, 128, 840, 664, 842.
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}.