LCM of 787, 700, 420, 169, 686
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 787, 700, 420, 169, 686 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 787, 700, 420, 169, 686. So, keep reading to learn more.
Given numbers are 787,700,420,169,686
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 787,700,420,169,686 is 13686008700.
Find LCM of 787,700,420,169,686 with Prime Factorization
| 2 | 787, 700, 420, 169, 686 |
| 2 | 787, 350, 210, 169, 343 |
| 5 | 787, 175, 105, 169, 343 |
| 7 | 787, 35, 21, 169, 343 |
| 787, 5, 3, 169, 49 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 5 x 7 x 787 x 5 x 3 x 169 x 49 = 13686008700
Therefore, the lowest common multiple of 787,700,420,169,686 is 13686008700.
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.
787 x 700 x 420 x 169 x 686 = 26824577052000
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.
787 : 1, 787
700 : 1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 100, 140, 175, 350, 700
420 : 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420
169 : 1, 13, 169
686 : 1, 2, 7, 14, 49, 98, 343, 686
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 787,700,420,169,686, is 1.
Now, the common factors can be found like this.
787:787
700:2x 2x 5x 5x 7
420:2x 2x 3x 5x 7
169:13x 13
686:2x 7x 7x 7
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 2x 5x 7x 7 = 1960
Therefore, the value for common factors is 1960.
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 = 26824577052000/(1x1960)
LCM = 26824577052000/1960
LCM = 13686008700
Thus, we can understand that the LCM of 787,700,420,169,686 is 13686008700.
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FAQs on LCM of 787, 700, 420, 169, 686
1. What is the LCM of 787, 700, 420, 169, 686?
Answer: LCM of 787, 700, 420, 169, 686 is 13686008700.
2. How to calculate the LCM of 787, 700, 420, 169, 686?
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 787, 700, 420, 169, 686.
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}.