LCM of 561, 781, 639, 242
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 561, 781, 639, 242 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, 781, 639, 242. So, keep reading to learn more.
Given numbers are 561,781,639,242
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 561,781,639,242 is 2628846.
Find LCM of 561,781,639,242 with Prime Factorization
| 3 | 561, 781, 639, 242 |
| 11 | 187, 781, 213, 242 |
| 71 | 17, 71, 213, 22 |
| 17, 1, 3, 22 |
Multiply the prime numbers at the bottom and the left side.
3 x 11 x 71 x 17 x 1 x 3 x 22 = 2628846
Therefore, the lowest common multiple of 561,781,639,242 is 2628846.
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 781 x 639 x 242 = 67753247958
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
781 : 1, 11, 71, 781
639 : 1, 3, 9, 71, 213, 639
242 : 1, 2, 11, 22, 121, 242
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 561,781,639,242, is 1.
Now, the common factors can be found like this.
561:3x 11x 17
781:11x 71
639:3x 3x 71
242:2x 11x 11
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 11x 11x 71 = 25773
Therefore, the value for common factors is 25773.
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 = 67753247958/(1x25773)
LCM = 67753247958/25773
LCM = 2628846
Thus, we can understand that the LCM of 561,781,639,242 is 2628846.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 561, 781, 639, 242
1. What is the LCM of 561, 781, 639, 242?
Answer: LCM of 561, 781, 639, 242 is 2628846.
2. How to calculate the LCM of 561, 781, 639, 242?
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, 781, 639, 242.
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}.