LCM of 287, 693, 561, 905
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 287, 693, 561, 905 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 287, 693, 561, 905. So, keep reading to learn more.
Given numbers are 287,693,561,905
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 287,693,561,905 is 437134005.
Find LCM of 287,693,561,905 with Prime Factorization
| 3 | 287, 693, 561, 905 |
| 7 | 287, 231, 187, 905 |
| 11 | 41, 33, 187, 905 |
| 41, 3, 17, 905 |
Multiply the prime numbers at the bottom and the left side.
3 x 7 x 11 x 41 x 3 x 17 x 905 = 437134005
Therefore, the lowest common multiple of 287,693,561,905 is 437134005.
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.
287 x 693 x 561 x 905 = 100977955155
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.
287 : 1, 7, 41, 287
693 : 1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 231, 693
561 : 1, 3, 11, 17, 33, 51, 187, 561
905 : 1, 5, 181, 905
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 287,693,561,905, is 1.
Now, the common factors can be found like this.
287:7x 41
693:3x 3x 7x 11
561:3x 11x 17
905:5x 181
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 7x 11 = 231
Therefore, the value for common factors is 231.
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 = 100977955155/(1x231)
LCM = 100977955155/231
LCM = 437134005
Thus, we can understand that the LCM of 287,693,561,905 is 437134005.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 287, 693, 561, 905
1. What is the LCM of 287, 693, 561, 905?
Answer: LCM of 287, 693, 561, 905 is 437134005.
2. How to calculate the LCM of 287, 693, 561, 905?
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 287, 693, 561, 905.
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}.