LCM of 642, 752, 638, 705
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 642, 752, 638, 705 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, 752, 638, 705. So, keep reading to learn more.
Given numbers are 642,752,638,705
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 642,752,638,705 is 385020240.
Find LCM of 642,752,638,705 with Prime Factorization
| 2 | 642, 752, 638, 705 |
| 3 | 321, 376, 319, 705 |
| 47 | 107, 376, 319, 235 |
| 107, 8, 319, 5 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 47 x 107 x 8 x 319 x 5 = 385020240
Therefore, the lowest common multiple of 642,752,638,705 is 385020240.
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 752 x 638 x 705 = 217151415360
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
752 : 1, 2, 4, 8, 16, 47, 94, 188, 376, 752
638 : 1, 2, 11, 22, 29, 58, 319, 638
705 : 1, 3, 5, 15, 47, 141, 235, 705
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 642,752,638,705, is 1.
Now, the common factors can be found like this.
642:2x 3x 107
752:2x 2x 2x 2x 47
638:2x 11x 29
705:3x 5x 47
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 3x 47 = 564
Therefore, the value for common factors is 564.
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 = 217151415360/(1x564)
LCM = 217151415360/564
LCM = 385020240
Thus, we can understand that the LCM of 642,752,638,705 is 385020240.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 642, 752, 638, 705
1. What is the LCM of 642, 752, 638, 705?
Answer: LCM of 642, 752, 638, 705 is 385020240.
2. How to calculate the LCM of 642, 752, 638, 705?
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, 752, 638, 705.
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}.