LCM of 645, 425, 649, 989
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 645, 425, 649, 989 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 645, 425, 649, 989. So, keep reading to learn more.
Given numbers are 645,425,649,989
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 645,425,649,989 is 818372775.
Find LCM of 645,425,649,989 with Prime Factorization
| 5 | 645, 425, 649, 989 |
| 43 | 129, 85, 649, 989 |
| 3, 85, 649, 23 |
Multiply the prime numbers at the bottom and the left side.
5 x 43 x 3 x 85 x 649 x 23 = 818372775
Therefore, the lowest common multiple of 645,425,649,989 is 818372775.
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.
645 x 425 x 649 x 989 = 175950146625
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.
645 : 1, 3, 5, 15, 43, 129, 215, 645
425 : 1, 5, 17, 25, 85, 425
649 : 1, 11, 59, 649
989 : 1, 23, 43, 989
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 645,425,649,989, is 1.
Now, the common factors can be found like this.
645:3x 5x 43
425:5x 5x 17
649:11x 59
989:23x 43
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
5x 43 = 215
Therefore, the value for common factors is 215.
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 = 175950146625/(1x215)
LCM = 175950146625/215
LCM = 818372775
Thus, we can understand that the LCM of 645,425,649,989 is 818372775.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 645, 425, 649, 989
1. What is the LCM of 645, 425, 649, 989?
Answer: LCM of 645, 425, 649, 989 is 818372775.
2. How to calculate the LCM of 645, 425, 649, 989?
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 645, 425, 649, 989.
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}.