LCM of 688, 668, 842, 645
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 688, 668, 842, 645 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, 668, 842, 645. So, keep reading to learn more.
Given numbers are 688,668,842,645
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 688,668,842,645 is 725568240.
Find LCM of 688,668,842,645 with Prime Factorization
| 2 | 688, 668, 842, 645 |
| 2 | 344, 334, 421, 645 |
| 43 | 172, 167, 421, 645 |
| 4, 167, 421, 15 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 43 x 4 x 167 x 421 x 15 = 725568240
Therefore, the lowest common multiple of 688,668,842,645 is 725568240.
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 668 x 842 x 645 = 249595474560
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
668 : 1, 2, 4, 167, 334, 668
842 : 1, 2, 421, 842
645 : 1, 3, 5, 15, 43, 129, 215, 645
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 688,668,842,645, is 1.
Now, the common factors can be found like this.
688:2x 2x 2x 2x 43
668:2x 2x 167
842:2x 421
645:3x 5x 43
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 43 = 344
Therefore, the value for common factors is 344.
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 = 249595474560/(1x344)
LCM = 249595474560/344
LCM = 725568240
Thus, we can understand that the LCM of 688,668,842,645 is 725568240.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 688, 668, 842, 645
1. What is the LCM of 688, 668, 842, 645?
Answer: LCM of 688, 668, 842, 645 is 725568240.
2. How to calculate the LCM of 688, 668, 842, 645?
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, 668, 842, 645.
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}.