LCM of 780, 989, 689, 208
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 780, 989, 689, 208 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 780, 989, 689, 208. So, keep reading to learn more.
Given numbers are 780,989,689,208
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 780,989,689,208 is 163541040.
Find LCM of 780,989,689,208 with Prime Factorization
| 2 | 780, 989, 689, 208 |
| 2 | 390, 989, 689, 104 |
| 13 | 195, 989, 689, 52 |
| 15, 989, 53, 4 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 13 x 15 x 989 x 53 x 4 = 163541040
Therefore, the lowest common multiple of 780,989,689,208 is 163541040.
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.
780 x 989 x 689 x 208 = 110553743040
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.
780 : 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780
989 : 1, 23, 43, 989
689 : 1, 13, 53, 689
208 : 1, 2, 4, 8, 13, 16, 26, 52, 104, 208
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 780,989,689,208, is 1.
Now, the common factors can be found like this.
780:2x 2x 3x 5x 13
989:23x 43
689:13x 53
208:2x 2x 2x 2x 13
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 13x 13 = 676
Therefore, the value for common factors is 676.
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 = 110553743040/(1x676)
LCM = 110553743040/676
LCM = 163541040
Thus, we can understand that the LCM of 780,989,689,208 is 163541040.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 780, 989, 689, 208
1. What is the LCM of 780, 989, 689, 208?
Answer: LCM of 780, 989, 689, 208 is 163541040.
2. How to calculate the LCM of 780, 989, 689, 208?
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 780, 989, 689, 208.
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}.