LCM of 660, 765, 787, 728, 689
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 660, 765, 787, 728, 689 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 660, 765, 787, 728, 689. So, keep reading to learn more.
Given numbers are 660,765,787,728,689
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 660,765,787,728,689 is 255526591320.
Find LCM of 660,765,787,728,689 with Prime Factorization
| 2 | 660, 765, 787, 728, 689 |
| 2 | 330, 765, 787, 364, 689 |
| 3 | 165, 765, 787, 182, 689 |
| 5 | 55, 255, 787, 182, 689 |
| 13 | 11, 51, 787, 182, 689 |
| 11, 51, 787, 14, 53 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 5 x 13 x 11 x 51 x 787 x 14 x 53 = 255526591320
Therefore, the lowest common multiple of 660,765,787,728,689 is 255526591320.
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.
660 x 765 x 787 x 728 x 689 = 199310741229600
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.
660 : 1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 165, 220, 330, 660
765 : 1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765
787 : 1, 787
728 : 1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364, 728
689 : 1, 13, 53, 689
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 660,765,787,728,689, is 1.
Now, the common factors can be found like this.
660:2x 2x 3x 5x 11
765:3x 3x 5x 17
787:787
728:2x 2x 2x 7x 13
689:13x 53
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 2x 3x 5x 13 = 780
Therefore, the value for common factors is 780.
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 = 199310741229600/(1x780)
LCM = 199310741229600/780
LCM = 255526591320
Thus, we can understand that the LCM of 660,765,787,728,689 is 255526591320.
LCM of two or more Numbers Calculation Examples
Here are some samples of LCM of two or more Numbers calculations.
FAQs on LCM of 660, 765, 787, 728, 689
1. What is the LCM of 660, 765, 787, 728, 689?
Answer: LCM of 660, 765, 787, 728, 689 is 255526591320.
2. How to calculate the LCM of 660, 765, 787, 728, 689?
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 660, 765, 787, 728, 689.
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}.