LCM of 784, 791, 978, 768
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 784, 791, 978, 768 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 784, 791, 978, 768. So, keep reading to learn more.
Given numbers are 784,791,978,768
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 784,791,978,768 is 693143808.
Find LCM of 784,791,978,768 with Prime Factorization
| 2 | 784, 791, 978, 768 |
| 2 | 392, 791, 489, 384 |
| 2 | 196, 791, 489, 192 |
| 2 | 98, 791, 489, 96 |
| 3 | 49, 791, 489, 48 |
| 7 | 49, 791, 163, 16 |
| 7, 113, 163, 16 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 2 x 3 x 7 x 7 x 113 x 163 x 16 = 693143808
Therefore, the lowest common multiple of 784,791,978,768 is 693143808.
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.
784 x 791 x 978 x 768 = 465792638976
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.
784 : 1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 98, 112, 196, 392, 784
791 : 1, 7, 113, 791
978 : 1, 2, 3, 6, 163, 326, 489, 978
768 : 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128, 192, 256, 384, 768
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 784,791,978,768, is 1.
Now, the common factors can be found like this.
784:2x 2x 2x 2x 7x 7
791:7x 113
978:2x 3x 163
768:2x 2x 2x 2x 2x 2x 2x 2x 3
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 2x 2x 3x 7 = 672
Therefore, the value for common factors is 672.
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 = 465792638976/(1x672)
LCM = 465792638976/672
LCM = 693143808
Thus, we can understand that the LCM of 784,791,978,768 is 693143808.
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FAQs on LCM of 784, 791, 978, 768
1. What is the LCM of 784, 791, 978, 768?
Answer: LCM of 784, 791, 978, 768 is 693143808.
2. How to calculate the LCM of 784, 791, 978, 768?
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 784, 791, 978, 768.
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}.