LCM of 121, 209, 646, 789
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 121, 209, 646, 789 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, 209, 646, 789. So, keep reading to learn more.
Given numbers are 121,209,646,789
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 121,209,646,789 is 61672974.
Find LCM of 121,209,646,789 with Prime Factorization
| 11 | 121, 209, 646, 789 |
| 19 | 11, 19, 646, 789 |
| 11, 1, 34, 789 |
Multiply the prime numbers at the bottom and the left side.
11 x 19 x 11 x 1 x 34 x 789 = 61672974
Therefore, the lowest common multiple of 121,209,646,789 is 61672974.
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 209 x 646 x 789 = 12889651566
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
209 : 1, 11, 19, 209
646 : 1, 2, 17, 19, 34, 38, 323, 646
789 : 1, 3, 263, 789
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 121,209,646,789, is 1.
Now, the common factors can be found like this.
121:11x 11
209:11x 19
646:2x 17x 19
789:3x 263
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
11x 19 = 209
Therefore, the value for common factors is 209.
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 = 12889651566/(1x209)
LCM = 12889651566/209
LCM = 61672974
Thus, we can understand that the LCM of 121,209,646,789 is 61672974.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 121, 209, 646, 789
1. What is the LCM of 121, 209, 646, 789?
Answer: LCM of 121, 209, 646, 789 is 61672974.
2. How to calculate the LCM of 121, 209, 646, 789?
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, 209, 646, 789.
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}.