LCM of 765, 645, 221, 405
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 765, 645, 221, 405 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 765, 645, 221, 405. So, keep reading to learn more.
Given numbers are 765,645,221,405
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 765,645,221,405 is 3848715.
Find LCM of 765,645,221,405 with Prime Factorization
| 3 | 765, 645, 221, 405 |
| 3 | 255, 215, 221, 135 |
| 5 | 85, 215, 221, 45 |
| 17 | 17, 43, 221, 9 |
| 1, 43, 13, 9 |
Multiply the prime numbers at the bottom and the left side.
3 x 3 x 5 x 17 x 1 x 43 x 13 x 9 = 3848715
Therefore, the lowest common multiple of 765,645,221,405 is 3848715.
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.
765 x 645 x 221 x 405 = 44164004625
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.
765 : 1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765
645 : 1, 3, 5, 15, 43, 129, 215, 645
221 : 1, 13, 17, 221
405 : 1, 3, 5, 9, 15, 27, 45, 81, 135, 405
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 765,645,221,405, is 1.
Now, the common factors can be found like this.
765:3x 3x 5x 17
645:3x 5x 43
221:13x 17
405:3x 3x 3x 3x 5
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 3x 5x 5x 17 = 11475
Therefore, the value for common factors is 11475.
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 = 44164004625/(1x11475)
LCM = 44164004625/11475
LCM = 3848715
Thus, we can understand that the LCM of 765,645,221,405 is 3848715.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 765, 645, 221, 405
1. What is the LCM of 765, 645, 221, 405?
Answer: LCM of 765, 645, 221, 405 is 3848715.
2. How to calculate the LCM of 765, 645, 221, 405?
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 765, 645, 221, 405.
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}.