LCM of 644, 789, 320, 738
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 644, 789, 320, 738 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 644, 789, 320, 738. So, keep reading to learn more.
Given numbers are 644,789,320,738
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 644,789,320,738 is 4999861440.
Find LCM of 644,789,320,738 with Prime Factorization
| 2 | 644, 789, 320, 738 |
| 2 | 322, 789, 160, 369 |
| 3 | 161, 789, 80, 369 |
| 161, 263, 80, 123 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 161 x 263 x 80 x 123 = 4999861440
Therefore, the lowest common multiple of 644,789,320,738 is 4999861440.
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.
644 x 789 x 320 x 738 = 119996674560
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.
644 : 1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644
789 : 1, 3, 263, 789
320 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320
738 : 1, 2, 3, 6, 9, 18, 41, 82, 123, 246, 369, 738
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 644,789,320,738, is 1.
Now, the common factors can be found like this.
644:2x 2x 7x 23
789:3x 263
320:2x 2x 2x 2x 2x 2x 5
738:2x 3x 3x 41
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 3 = 24
Therefore, the value for common factors is 24.
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 = 119996674560/(1x24)
LCM = 119996674560/24
LCM = 4999861440
Thus, we can understand that the LCM of 644,789,320,738 is 4999861440.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 644, 789, 320, 738
1. What is the LCM of 644, 789, 320, 738?
Answer: LCM of 644, 789, 320, 738 is 4999861440.
2. How to calculate the LCM of 644, 789, 320, 738?
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 644, 789, 320, 738.
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}.