LCM of 40 and 47
Reviewed By : Phani Ponnapalli
Last Updated at : Mar 29,2023
It is easy to find the LCM of 40 and 47 with the help of the handy LCM Calculator. You have to enter 44, and 60 as inputs to avail the LCM 1880 as output. Here you can check the answer for Find the LCM of 40 and 47.
What is LCM of 40 and 47
Given Numbers are 40, 47
We can find the LCM of 40, 47 using the brute force method, prime factorization method, or GCD method.
To use brute force method, list the multiples of 40 and 47
Multiples of 40 =40,80,120,160,200,240,280,320,360,400,440,480,520,560,600,640,680,
Multiples of 47 =47,94,141,188,235,282,329,376,423,470,517,564,611,658,705,752,799,
Now, get the least common multiple of 40, 47 which is 1880
So, the LCM of 40, 47 is 1880.
Least Common Multiple (LCM) of 40 and 47 with the help of Prime Factorisation
One method for determining the LCM of 40 and 47 is to compare the prime factorization of each number. You can find the prime factorization for each number by following the instructions below:
Here is 40's prime factorization:
| 2 | 40 |
| 2 | 20 |
| 2 | 10 |
| 5 | 5 |
| 1 |
Prime factors of 40 are 2,5.
40 = 23×51
And this is 47's prime factorization:
| 47 | 47 |
| 1 |
Prime factors of 47 are 47.
47 = 471
When comparing the prime factorization of these two numbers, look for the highest power to which each prime factor is raised. In this case, the following primary factors must be considered: 2,5,47
.23×51×471 = 1880
This shows that the LCM of 40 and 47 is 1880.
How to Calculate the LCM of 40 and 47 Using Common Multiples
The first step in determining the Least Common Multiple of 40 and 47 is to generate a list of multiples for each number.
Lets look at the multiples of these two numbers, 40 and 47:
Lets look at the first ten multiples of these numbers, 40 and 47:
40,80,120,160,200,240,280,320,360,680 are the first ten multiples of 40.
47,94,141,188,235,282,329,376,423,799 are the first ten multiples of 47.
You can continue to list the multiples of these numbers until you find a match. Once you have found a match, or several matches, the Least Common Multiple is the smallest of these matches. The first matching multiple(s) of 40 and 47, for example, are 480, 680, and 752. 1880 is the least common multiple since it is the smallest.
40 and 47 have an LCM of 1880.
Least Common Multiple of 40 and 47 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 40 and 47, than apply into the LCM equation.
GCF(40,47) = 1
LCM(40,47) = ( 40 × 47) / 1
LCM(40,47) = 1880 / 1
LCM(40,47) = 1880
Related Least Common Multiples of 40
Related Least Common Multiples of 47
Frequently Asked Questions on LCM of 40 and 47
1. What is the LCM of 40 and 47?
The LCM of 40 and 47 is 1880.
2. How to find the lowest common multiple of 40 and 47?
To find the lowest common multiple of 40 and 47, we have to get the multip;es of both numbers and identify the least common multiple in them which is 1880.
3. What are the Factors of 40?
Answer: Factors of 40 are 1, 2, 4, 5, 8, 10, 20, 40. There are 8 integers that are factors of 40. The greatest factor of 40 is 40.
4. What are the Factors of 47?
Answer: Factors of 47 are 1, 47. There are 2 integers that are factors of 47. The greatest factor of 47 is 47.
5. How to Find the LCM of 40 and 47?Answer:
Least Common Multiple of 40 and 47 = 1880
Step 1: Find the prime factorization of 40
40 = 2 x 2 x 2 x 5
Step 2: Find the prime factorization of 47
47 = 47
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 1880 = 2 x 2 x 2 x 5 x 47
Step 4: Therefore, the least common multiple of 40 and 47 is 1880.