Least Common Multiple of 8 and 13

Least common multiple or lowest common denominator (LCD) can be calculated in three ways;

• Least Common Multiple of 8 and 13 by Prime method
• Least Common Multiple of 8 and 13 with GCF Formula

Least common multiple can be found by multiplying the highest exponent prime factors of 8 and 13. First we will calculate the prime factors of 8 and 13.

Prime Factorization of 8

Prime factors of 8 are 2. Prime factorization of 8 in exponential form is:

8 = 2³

Prime Factorization of 13

Prime factors of 13 are 13. Prime factorization of 13 in exponential form is:

13 = 13¹

Now multiplying the highest exponent prime factors to calculate the LCM of 8 and 13.

LCM(8,13) = 2³×13¹
LCM(8,13) = 104

Factors of 8

List of positive integer factors of 8 that divides 8 without a remainder.

1, 2, 4, 8

Factors of 13

List of positive integer factors of 13 that divides 13 without a remainder.

1, 13

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 8 and 13, than apply into the LCM equation.

GCF(8,13) = 1
LCM(8,13) = ( 8 × 13) / 1
LCM(8,13) = 104 / 1
LCM(8,13) = 104

(i) The LCM of 13 and 8 is associative

LCM of 8 and 13 = LCM of 13 and 8

1. What is the LCM of 8 and 13?

Answer: LCM of 8 and 13 is 104.

2. What are the Factors of 8?

Answer: Factors of 8 are 1, 2, 4, 8. There are 4 integers that are factors of 8. The greatest factor of 8 is 8.

3. What are the Factors of 13?

Answer: Factors of 13 are 1, 13. There are 2 integers that are factors of 13. The greatest factor of 13 is 13.

4. How to Find the LCM of 8 and 13?

Answer:

Least Common Multiple of 8 and 13 = 104

Step 1: Find the prime factorization of 8

8 = 2 x 2 x 2

Step 2: Find the prime factorization of 13

13 = 13

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

LCM = 104 = 2 x 2 x 2 x 13

Step 4: Therefore, the least common multiple of 8 and 13 is 104.