LCM of 420, 556, 309, 730
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 420, 556, 309, 730 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 420, 556, 309, 730. So, keep reading to learn more.
Given numbers are 420,556,309,730
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 420,556,309,730 is 438959220.
Find LCM of 420,556,309,730 with Prime Factorization
| 2 | 420, 556, 309, 730 |
| 2 | 210, 278, 309, 365 |
| 3 | 105, 139, 309, 365 |
| 5 | 35, 139, 103, 365 |
| 7, 139, 103, 73 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 5 x 7 x 139 x 103 x 73 = 438959220
Therefore, the lowest common multiple of 420,556,309,730 is 438959220.
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.
420 x 556 x 309 x 730 = 52675106400
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.
420 : 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420
556 : 1, 2, 4, 139, 278, 556
309 : 1, 3, 103, 309
730 : 1, 2, 5, 10, 73, 146, 365, 730
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 420,556,309,730, is 1.
Now, the common factors can be found like this.
420:2x 2x 3x 5x 7
556:2x 2x 139
309:3x 103
730:2x 5x 73
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 2x 2x 3x 5 = 120
Therefore, the value for common factors is 120.
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 = 52675106400/(1x120)
LCM = 52675106400/120
LCM = 438959220
Thus, we can understand that the LCM of 420,556,309,730 is 438959220.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 420, 556, 309, 730
1. What is the LCM of 420, 556, 309, 730?
Answer: LCM of 420, 556, 309, 730 is 438959220.
2. How to calculate the LCM of 420, 556, 309, 730?
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 420, 556, 309, 730.
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}.