LCM of 721, 490, 618, 209
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 721, 490, 618, 209 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 721, 490, 618, 209. So, keep reading to learn more.
Given numbers are 721,490,618,209
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 721,490,618,209 is 31644690.
Find LCM of 721,490,618,209 with Prime Factorization
| 2 | 721, 490, 618, 209 |
| 7 | 721, 245, 309, 209 |
| 103 | 103, 35, 309, 209 |
| 1, 35, 3, 209 |
Multiply the prime numbers at the bottom and the left side.
2 x 7 x 103 x 1 x 35 x 3 x 209 = 31644690
Therefore, the lowest common multiple of 721,490,618,209 is 31644690.
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.
721 x 490 x 618 x 209 = 45631642980
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.
721 : 1, 7, 103, 721
490 : 1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490
618 : 1, 2, 3, 6, 103, 206, 309, 618
209 : 1, 11, 19, 209
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 721,490,618,209, is 1.
Now, the common factors can be found like this.
721:7x 103
490:2x 5x 7x 7
618:2x 3x 103
209:11x 19
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 7x 103 = 1442
Therefore, the value for common factors is 1442.
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 = 45631642980/(1x1442)
LCM = 45631642980/1442
LCM = 31644690
Thus, we can understand that the LCM of 721,490,618,209 is 31644690.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 721, 490, 618, 209
1. What is the LCM of 721, 490, 618, 209?
Answer: LCM of 721, 490, 618, 209 is 31644690.
2. How to calculate the LCM of 721, 490, 618, 209?
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 721, 490, 618, 209.
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}.