LCM of 778, 645, 340, 221
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 778, 645, 340, 221 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 778, 645, 340, 221. So, keep reading to learn more.
Given numbers are 778,645,340,221
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 778,645,340,221 is 221800020.
Find LCM of 778,645,340,221 with Prime Factorization
| 2 | 778, 645, 340, 221 |
| 5 | 389, 645, 170, 221 |
| 17 | 389, 129, 34, 221 |
| 389, 129, 2, 13 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 17 x 389 x 129 x 2 x 13 = 221800020
Therefore, the lowest common multiple of 778,645,340,221 is 221800020.
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.
778 x 645 x 340 x 221 = 37706003400
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.
778 : 1, 2, 389, 778
645 : 1, 3, 5, 15, 43, 129, 215, 645
340 : 1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340
221 : 1, 13, 17, 221
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 778,645,340,221, is 1.
Now, the common factors can be found like this.
778:2x 389
645:3x 5x 43
340:2x 2x 5x 17
221:13x 17
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 5x 17 = 170
Therefore, the value for common factors is 170.
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 = 37706003400/(1x170)
LCM = 37706003400/170
LCM = 221800020
Thus, we can understand that the LCM of 778,645,340,221 is 221800020.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 778, 645, 340, 221
1. What is the LCM of 778, 645, 340, 221?
Answer: LCM of 778, 645, 340, 221 is 221800020.
2. How to calculate the LCM of 778, 645, 340, 221?
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 778, 645, 340, 221.
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}.