LCM of 642, 658, 756, 315
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 642, 658, 756, 315 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, 658, 756, 315. So, keep reading to learn more.
Given numbers are 642,658,756,315
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 642,658,756,315 is 19009620.
Find LCM of 642,658,756,315 with Prime Factorization
| 2 | 642, 658, 756, 315 |
| 3 | 321, 329, 378, 315 |
| 3 | 107, 329, 126, 105 |
| 7 | 107, 329, 42, 35 |
| 107, 47, 6, 5 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 3 x 7 x 107 x 47 x 6 x 5 = 19009620
Therefore, the lowest common multiple of 642,658,756,315 is 19009620.
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 658 x 756 x 315 = 100598909040
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
658 : 1, 2, 7, 14, 47, 94, 329, 658
756 : 1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 42, 54, 63, 84, 108, 126, 189, 252, 378, 756
315 : 1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 642,658,756,315, is 1.
Now, the common factors can be found like this.
642:2x 3x 107
658:2x 7x 47
756:2x 2x 3x 3x 3x 7
315:3x 3x 5x 7
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 3x 3x 7x 7 = 5292
Therefore, the value for common factors is 5292.
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 = 100598909040/(1x5292)
LCM = 100598909040/5292
LCM = 19009620
Thus, we can understand that the LCM of 642,658,756,315 is 19009620.
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FAQs on LCM of 642, 658, 756, 315
1. What is the LCM of 642, 658, 756, 315?
Answer: LCM of 642, 658, 756, 315 is 19009620.
2. How to calculate the LCM of 642, 658, 756, 315?
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, 658, 756, 315.
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}.