Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 18 and 32 the smallest integer that is 288 that is divisible by both numbers.
Least Common Multiple (LCM) of 18 and 32 is 288.
LCM(18,32) = 288
Least common multiple or lowest common denominator (LCD) can be calculated in three ways;
Least common multiple can be found by multiplying the highest exponent prime factors of 18 and 32. First we will calculate the prime factors of 18 and 32.
Prime Factorization of 18
2 | 18 |
3 | 9 |
3 | 3 |
1 |
Prime factors of 18 are 2,3. Prime factorization of 18 in exponential form is:
18 = 21×32
Prime Factorization of 32
2 | 32 |
2 | 16 |
2 | 8 |
2 | 4 |
2 | 2 |
1 |
Prime factors of 32 are 2. Prime factorization of 32 in exponential form is:
32 = 25
Now multiplying the highest exponent prime factors to calculate the LCM of 18 and 32.
LCM(18,32) = 25×32
LCM(18,32) = 288
Factors of 18
List of positive integer factors of 18 that divides 18 without a remainder.
1, 2, 3, 6, 9, 18
Factors of 32
List of positive integer factors of 32 that divides 32 without a remainder.
1, 2, 4, 8, 16, 32
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 18 and 32, than apply into the LCM equation.
GCF(18,32) = 2
LCM(18,32) = ( 18 × 32) / 2
LCM(18,32) = 576 / 2
LCM(18,32) = 288
(i) The LCM of 32 and 18 is associative
LCM of 18 and 32 = LCM of 32 and 18
1. What is the LCM of 18 and 32?
Answer: LCM of 18 and 32 is 288.
2. What are the Factors of 18?
Answer: Factors of 18 are 1, 2, 3, 6, 9, 18. There are 6 integers that are factors of 18. The greatest factor of 18 is 18.
3. What are the Factors of 32?
Answer: Factors of 32 are 1, 2, 4, 8, 16, 32. There are 6 integers that are factors of 32. The greatest factor of 32 is 32.
4. How to Find the LCM of 18 and 32?
Answer:
Least Common Multiple of 18 and 32 = 288
Step 1: Find the prime factorization of 18
18 = 2 x 3 x 3
Step 2: Find the prime factorization of 32
32 = 2 x 2 x 2 x 2 x 2
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 288 = 2 x 2 x 2 x 2 x 2 x 3 x 3
Step 4: Therefore, the least common multiple of 18 and 32 is 288.