LCM of 121, 605, 765, 645
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 121, 605, 765, 645 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 121, 605, 765, 645. So, keep reading to learn more.
Given numbers are 121,605,765,645
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 121,605,765,645 is 3980295.
Find LCM of 121,605,765,645 with Prime Factorization
| 3 | 121, 605, 765, 645 |
| 5 | 121, 605, 255, 215 |
| 11 | 121, 121, 51, 43 |
| 11 | 11, 11, 51, 43 |
| 1, 1, 51, 43 |
Multiply the prime numbers at the bottom and the left side.
3 x 5 x 11 x 11 x 1 x 1 x 51 x 43 = 3980295
Therefore, the lowest common multiple of 121,605,765,645 is 3980295.
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.
121 x 605 x 765 x 645 = 36121177125
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.
121 : 1, 11, 121
605 : 1, 5, 11, 55, 121, 605
765 : 1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765
645 : 1, 3, 5, 15, 43, 129, 215, 645
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 121,605,765,645, is 1.
Now, the common factors can be found like this.
121:11x 11
605:5x 11x 11
765:3x 3x 5x 17
645:3x 5x 43
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 5x 5x 11x 11 = 9075
Therefore, the value for common factors is 9075.
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 = 36121177125/(1x9075)
LCM = 36121177125/9075
LCM = 3980295
Thus, we can understand that the LCM of 121,605,765,645 is 3980295.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 121, 605, 765, 645
1. What is the LCM of 121, 605, 765, 645?
Answer: LCM of 121, 605, 765, 645 is 3980295.
2. How to calculate the LCM of 121, 605, 765, 645?
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 121, 605, 765, 645.
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}.