LCM of 642, 280, 749, 957
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 642, 280, 749, 957 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 642, 280, 749, 957. So, keep reading to learn more.
Given numbers are 642,280,749,957
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 642,280,749,957 is 28671720.
Find LCM of 642,280,749,957 with Prime Factorization
| 2 | 642, 280, 749, 957 |
| 3 | 321, 140, 749, 957 |
| 7 | 107, 140, 749, 319 |
| 107 | 107, 20, 107, 319 |
| 1, 20, 1, 319 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 7 x 107 x 1 x 20 x 1 x 319 = 28671720
Therefore, the lowest common multiple of 642,280,749,957 is 28671720.
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.
642 x 280 x 749 x 957 = 128850709680
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.
642 : 1, 2, 3, 6, 107, 214, 321, 642
280 : 1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280
749 : 1, 7, 107, 749
957 : 1, 3, 11, 29, 33, 87, 319, 957
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 642,280,749,957, is 1.
Now, the common factors can be found like this.
642:2x 3x 107
280:2x 2x 2x 5x 7
749:7x 107
957:3x 11x 29
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 3x 7x 107 = 4494
Therefore, the value for common factors is 4494.
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 = 128850709680/(1x4494)
LCM = 128850709680/4494
LCM = 28671720
Thus, we can understand that the LCM of 642,280,749,957 is 28671720.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 642, 280, 749, 957
1. What is the LCM of 642, 280, 749, 957?
Answer: LCM of 642, 280, 749, 957 is 28671720.
2. How to calculate the LCM of 642, 280, 749, 957?
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 642, 280, 749, 957.
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}.