LCM of 647, 399, 209, 917
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 647, 399, 209, 917 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 647, 399, 209, 917. So, keep reading to learn more.
Given numbers are 647,399,209,917
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 647,399,209,917 is 371998473.
Find LCM of 647,399,209,917 with Prime Factorization
| 7 | 647, 399, 209, 917 |
| 19 | 647, 57, 209, 131 |
| 647, 3, 11, 131 |
Multiply the prime numbers at the bottom and the left side.
7 x 19 x 647 x 3 x 11 x 131 = 371998473
Therefore, the lowest common multiple of 647,399,209,917 is 371998473.
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.
647 x 399 x 209 x 917 = 49475796909
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.
647 : 1, 647
399 : 1, 3, 7, 19, 21, 57, 133, 399
209 : 1, 11, 19, 209
917 : 1, 7, 131, 917
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 647,399,209,917, is 1.
Now, the common factors can be found like this.
647:647
399:3x 7x 19
209:11x 19
917:7x 131
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
7x 19 = 133
Therefore, the value for common factors is 133.
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 = 49475796909/(1x133)
LCM = 49475796909/133
LCM = 371998473
Thus, we can understand that the LCM of 647,399,209,917 is 371998473.
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FAQs on LCM of 647, 399, 209, 917
1. What is the LCM of 647, 399, 209, 917?
Answer: LCM of 647, 399, 209, 917 is 371998473.
2. How to calculate the LCM of 647, 399, 209, 917?
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 647, 399, 209, 917.
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}.