LCM of 645, 157, 767, 780
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 645, 157, 767, 780 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, 157, 767, 780. So, keep reading to learn more.
Given numbers are 645,157,767,780
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 645,157,767,780 is 310681020.
Find LCM of 645,157,767,780 with Prime Factorization
| 3 | 645, 157, 767, 780 |
| 5 | 215, 157, 767, 260 |
| 13 | 43, 157, 767, 52 |
| 43, 157, 59, 4 |
Multiply the prime numbers at the bottom and the left side.
3 x 5 x 13 x 43 x 157 x 59 x 4 = 310681020
Therefore, the lowest common multiple of 645,157,767,780 is 310681020.
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 157 x 767 x 780 = 60582798900
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
157 : 1, 157
767 : 1, 13, 59, 767
780 : 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 645,157,767,780, is 1.
Now, the common factors can be found like this.
645:3x 5x 43
157:157
767:13x 59
780:2x 2x 3x 5x 13
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 5x 13 = 195
Therefore, the value for common factors is 195.
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 = 60582798900/(1x195)
LCM = 60582798900/195
LCM = 310681020
Thus, we can understand that the LCM of 645,157,767,780 is 310681020.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 645, 157, 767, 780
1. What is the LCM of 645, 157, 767, 780?
Answer: LCM of 645, 157, 767, 780 is 310681020.
2. How to calculate the LCM of 645, 157, 767, 780?
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, 157, 767, 780.
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}.