LCM of 257, 671, 420, 315
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 257, 671, 420, 315 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 257, 671, 420, 315. So, keep reading to learn more.
Given numbers are 257,671,420,315
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 257,671,420,315 is 217283220.
Find LCM of 257,671,420,315 with Prime Factorization
| 3 | 257, 671, 420, 315 |
| 5 | 257, 671, 140, 105 |
| 7 | 257, 671, 28, 21 |
| 257, 671, 4, 3 |
Multiply the prime numbers at the bottom and the left side.
3 x 5 x 7 x 257 x 671 x 4 x 3 = 217283220
Therefore, the lowest common multiple of 257,671,420,315 is 217283220.
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.
257 x 671 x 420 x 315 = 22814738100
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.
257 : 1, 257
671 : 1, 11, 61, 671
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
315 : 1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 257,671,420,315, is 1.
Now, the common factors can be found like this.
257:257
671:11x 61
420:2x 2x 3x 5x 7
315:3x 3x 5x 7
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 7 = 105
Therefore, the value for common factors is 105.
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 = 22814738100/(1x105)
LCM = 22814738100/105
LCM = 217283220
Thus, we can understand that the LCM of 257,671,420,315 is 217283220.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 257, 671, 420, 315
1. What is the LCM of 257, 671, 420, 315?
Answer: LCM of 257, 671, 420, 315 is 217283220.
2. How to calculate the LCM of 257, 671, 420, 315?
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 257, 671, 420, 315.
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}.