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 34 the smallest integer that is 306 that is divisible by both numbers.
Least Common Multiple (LCM) of 18 and 34 is 306.
LCM(18,34) = 306
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 34. First we will calculate the prime factors of 18 and 34.
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 34
2 | 34 |
17 | 17 |
1 |
Prime factors of 34 are 2,17. Prime factorization of 34 in exponential form is:
34 = 21×171
Now multiplying the highest exponent prime factors to calculate the LCM of 18 and 34.
LCM(18,34) = 21×32×171
LCM(18,34) = 306
Factors of 18
List of positive integer factors of 18 that divides 18 without a remainder.
1, 2, 3, 6, 9, 18
Factors of 34
List of positive integer factors of 34 that divides 34 without a remainder.
1, 2, 17, 34
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 18 and 34, than apply into the LCM equation.
GCF(18,34) = 2
LCM(18,34) = ( 18 × 34) / 2
LCM(18,34) = 612 / 2
LCM(18,34) = 306
(i) The LCM of 34 and 18 is associative
LCM of 18 and 34 = LCM of 34 and 18
1. What is the LCM of 18 and 34?
Answer: LCM of 18 and 34 is 306.
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 34?
Answer: Factors of 34 are 1, 2, 17, 34. There are 4 integers that are factors of 34. The greatest factor of 34 is 34.
4. How to Find the LCM of 18 and 34?
Answer:
Least Common Multiple of 18 and 34 = 306
Step 1: Find the prime factorization of 18
18 = 2 x 3 x 3
Step 2: Find the prime factorization of 34
34 = 2 x 17
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 306 = 2 x 3 x 3 x 17
Step 4: Therefore, the least common multiple of 18 and 34 is 306.