LCM of 561, 638, 786, 641
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 561, 638, 786, 641 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 561, 638, 786, 641. So, keep reading to learn more.
Given numbers are 561,638,786,641
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 561,638,786,641 is 2732248398.
Find LCM of 561,638,786,641 with Prime Factorization
| 2 | 561, 638, 786, 641 |
| 3 | 561, 319, 393, 641 |
| 11 | 187, 319, 131, 641 |
| 17, 29, 131, 641 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 11 x 17 x 29 x 131 x 641 = 2732248398
Therefore, the lowest common multiple of 561,638,786,641 is 2732248398.
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.
561 x 638 x 786 x 641 = 180328394268
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.
561 : 1, 3, 11, 17, 33, 51, 187, 561
638 : 1, 2, 11, 22, 29, 58, 319, 638
786 : 1, 2, 3, 6, 131, 262, 393, 786
641 : 1, 641
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 561,638,786,641, is 1.
Now, the common factors can be found like this.
561:3x 11x 17
638:2x 11x 29
786:2x 3x 131
641:641
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 11 = 66
Therefore, the value for common factors is 66.
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 = 180328394268/(1x66)
LCM = 180328394268/66
LCM = 2732248398
Thus, we can understand that the LCM of 561,638,786,641 is 2732248398.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 561, 638, 786, 641
1. What is the LCM of 561, 638, 786, 641?
Answer: LCM of 561, 638, 786, 641 is 2732248398.
2. How to calculate the LCM of 561, 638, 786, 641?
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 561, 638, 786, 641.
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}.