LCM of 789, 361, 399, 972
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 789, 361, 399, 972 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 789, 361, 399, 972. So, keep reading to learn more.
Given numbers are 789,361,399,972
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 789,361,399,972 is 645992172.
Find LCM of 789,361,399,972 with Prime Factorization
| 3 | 789, 361, 399, 972 |
| 19 | 263, 361, 133, 324 |
| 263, 19, 7, 324 |
Multiply the prime numbers at the bottom and the left side.
3 x 19 x 263 x 19 x 7 x 324 = 645992172
Therefore, the lowest common multiple of 789,361,399,972 is 645992172.
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.
789 x 361 x 399 x 972 = 110464661412
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.
789 : 1, 3, 263, 789
361 : 1, 19, 361
399 : 1, 3, 7, 19, 21, 57, 133, 399
972 : 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, 243, 324, 486, 972
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 789,361,399,972, is 1.
Now, the common factors can be found like this.
789:3x 263
361:19x 19
399:3x 7x 19
972:2x 2x 3x 3x 3x 3x 3
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 3x 19 = 171
Therefore, the value for common factors is 171.
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 = 110464661412/(1x171)
LCM = 110464661412/171
LCM = 645992172
Thus, we can understand that the LCM of 789,361,399,972 is 645992172.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 789, 361, 399, 972
1. What is the LCM of 789, 361, 399, 972?
Answer: LCM of 789, 361, 399, 972 is 645992172.
2. How to calculate the LCM of 789, 361, 399, 972?
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 789, 361, 399, 972.
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}.