LCM of 621, 644, 391, 764
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 621, 644, 391, 764 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 621, 644, 391, 764. So, keep reading to learn more.
Given numbers are 621,644,391,764
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 621,644,391,764 is 56458836.
Find LCM of 621,644,391,764 with Prime Factorization
| 2 | 621, 644, 391, 764 |
| 2 | 621, 322, 391, 382 |
| 23 | 621, 161, 391, 191 |
| 27, 7, 17, 191 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 23 x 27 x 7 x 17 x 191 = 56458836
Therefore, the lowest common multiple of 621,644,391,764 is 56458836.
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.
621 x 644 x 391 x 764 = 119466896976
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.
621 : 1, 3, 9, 23, 27, 69, 207, 621
644 : 1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644
391 : 1, 17, 23, 391
764 : 1, 2, 4, 191, 382, 764
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 621,644,391,764, is 1.
Now, the common factors can be found like this.
621:3x 3x 3x 23
644:2x 2x 7x 23
391:17x 23
764:2x 2x 191
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 23x 23 = 2116
Therefore, the value for common factors is 2116.
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 = 119466896976/(1x2116)
LCM = 119466896976/2116
LCM = 56458836
Thus, we can understand that the LCM of 621,644,391,764 is 56458836.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 621, 644, 391, 764
1. What is the LCM of 621, 644, 391, 764?
Answer: LCM of 621, 644, 391, 764 is 56458836.
2. How to calculate the LCM of 621, 644, 391, 764?
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 621, 644, 391, 764.
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}.