LCM of 715, 420, 238, 785
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 715, 420, 238, 785 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 715, 420, 238, 785. So, keep reading to learn more.
Given numbers are 715,420,238,785
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 715,420,238,785 is 160300140.
Find LCM of 715,420,238,785 with Prime Factorization
| 2 | 715, 420, 238, 785 |
| 5 | 715, 210, 119, 785 |
| 7 | 143, 42, 119, 157 |
| 143, 6, 17, 157 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 7 x 143 x 6 x 17 x 157 = 160300140
Therefore, the lowest common multiple of 715,420,238,785 is 160300140.
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.
715 x 420 x 238 x 785 = 56105049000
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.
715 : 1, 5, 11, 13, 55, 65, 143, 715
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
238 : 1, 2, 7, 14, 17, 34, 119, 238
785 : 1, 5, 157, 785
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 715,420,238,785, is 1.
Now, the common factors can be found like this.
715:5x 11x 13
420:2x 2x 3x 5x 7
238:2x 7x 17
785:5x 157
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 5x 7 = 350
Therefore, the value for common factors is 350.
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 = 56105049000/(1x350)
LCM = 56105049000/350
LCM = 160300140
Thus, we can understand that the LCM of 715,420,238,785 is 160300140.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 715, 420, 238, 785
1. What is the LCM of 715, 420, 238, 785?
Answer: LCM of 715, 420, 238, 785 is 160300140.
2. How to calculate the LCM of 715, 420, 238, 785?
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 715, 420, 238, 785.
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}.