LCM of 129, 640, 665, 770
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 129, 640, 665, 770 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 129, 640, 665, 770. So, keep reading to learn more.
Given numbers are 129,640,665,770
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 129,640,665,770 is 120785280.
Find LCM of 129,640,665,770 with Prime Factorization
| 2 | 129, 640, 665, 770 |
| 5 | 129, 320, 665, 385 |
| 7 | 129, 64, 133, 77 |
| 129, 64, 19, 11 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 7 x 129 x 64 x 19 x 11 = 120785280
Therefore, the lowest common multiple of 129,640,665,770 is 120785280.
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.
129 x 640 x 665 x 770 = 42274848000
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.
129 : 1, 3, 43, 129
640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
665 : 1, 5, 7, 19, 35, 95, 133, 665
770 : 1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 154, 385, 770
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 129,640,665,770, is 1.
Now, the common factors can be found like this.
129:3x 43
640:2x 2x 2x 2x 2x 2x 2x 5
665:5x 7x 19
770:2x 5x 7x 11
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 5x 5x 7 = 350
Therefore, the value for common factors is 350.
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 = 42274848000/(1x350)
LCM = 42274848000/350
LCM = 120785280
Thus, we can understand that the LCM of 129,640,665,770 is 120785280.
LCM of two or more Numbers Calculation Examples
Here are some samples of LCM of two or more Numbers calculations.
FAQs on LCM of 129, 640, 665, 770
1. What is the LCM of 129, 640, 665, 770?
Answer: LCM of 129, 640, 665, 770 is 120785280.
2. How to calculate the LCM of 129, 640, 665, 770?
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 129, 640, 665, 770.
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}.