Given Numbers are 31, 39

We can find the LCM of 31, 39 using the brute force method, prime factorization method, or GCD method.

To use brute force method, list the multiples of 31 and 39

Multiples of 31 =31,62,93,124,155,186,217,248,279,310,341,372,403,434,465,496,527,

Multiples of 39 =39,78,117,156,195,234,273,312,351,390,429,468,507,546,585,624,663,

Now, get the least common multiple of 31, 39 which is 1209

So, the LCM of 31, 39 is 1209.

One method for determining the LCM of 31 and 39 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 31's prime factorization:

Prime factors of 31 are 31.

31 = 31¹

And this is 39's prime factorization:

Prime factors of 39 are 3,13.

39 = 3¹×13¹

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:31, 3,13

3¹×13¹×31¹ = 1209

This shows that the LCM of 31 and 39 is 1209.

The first step in determining the Least Common Multiple of 31 and 39 is to generate a list of multiples for each number.

Lets look at the multiples of these two numbers, 31 and 39:

Lets look at the first ten multiples of these numbers, 31 and 39:

31,62,93,124,155,186,217,248,279,527 are the first ten multiples of 31.

39,78,117,156,195,234,273,312,351,663 are the first ten multiples of 39.

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 31 and 39, for example, are 372, 527, and 624. 1209 is the least common multiple since it is the smallest.

31 and 39 have an LCM of 1209.

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 31 and 39, than apply into the LCM equation.

GCF(31,39) = 1
LCM(31,39) = ( 31 × 39) / 1
LCM(31,39) = 1209 / 1
LCM(31,39) = 1209

1. What is the LCM of 31 and 39?

The LCM of 31 and 39 is 1209.

2. How to find the lowest common multiple of 31 and 39?

To find the lowest common multiple of 31 and 39, we have to get the multip;es of both numbers and identify the least common multiple in them which is 1209.

3. What are the Factors of 31?

Answer: Factors of 31 are 1, 31. There are 2 integers that are factors of 31. The greatest factor of 31 is 31.

4. What are the Factors of 39?

Answer: Factors of 39 are 1, 3, 13, 39. There are 4 integers that are factors of 39. The greatest factor of 39 is 39.

Answer:

Least Common Multiple of 31 and 39 = 1209

Step 1: Find the prime factorization of 31

31 = 31

Step 2: Find the prime factorization of 39

39 = 3 x 13

Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:

LCM = 1209 = 3 x 13 x 31

Step 4: Therefore, the least common multiple of 31 and 39 is 1209.