LCM of 663, 987, 768, 221
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 663, 987, 768, 221 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 663, 987, 768, 221. So, keep reading to learn more.
Given numbers are 663,987,768,221
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 663,987,768,221 is 55840512.
Find LCM of 663,987,768,221 with Prime Factorization
| 3 | 663, 987, 768, 221 |
| 13 | 221, 329, 256, 221 |
| 17 | 17, 329, 256, 17 |
| 1, 329, 256, 1 |
Multiply the prime numbers at the bottom and the left side.
3 x 13 x 17 x 1 x 329 x 256 x 1 = 55840512
Therefore, the lowest common multiple of 663,987,768,221 is 55840512.
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.
663 x 987 x 768 x 221 = 111066778368
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.
663 : 1, 3, 13, 17, 39, 51, 221, 663
987 : 1, 3, 7, 21, 47, 141, 329, 987
768 : 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128, 192, 256, 384, 768
221 : 1, 13, 17, 221
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 663,987,768,221, is 1.
Now, the common factors can be found like this.
663:3x 13x 17
987:3x 7x 47
768:2x 2x 2x 2x 2x 2x 2x 2x 3
221:13x 17
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 3x 13x 17 = 1989
Therefore, the value for common factors is 1989.
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 = 111066778368/(1x1989)
LCM = 111066778368/1989
LCM = 55840512
Thus, we can understand that the LCM of 663,987,768,221 is 55840512.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 663, 987, 768, 221
1. What is the LCM of 663, 987, 768, 221?
Answer: LCM of 663, 987, 768, 221 is 55840512.
2. How to calculate the LCM of 663, 987, 768, 221?
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 663, 987, 768, 221.
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}.