Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 54 and 74 the smallest integer that is 1998 that is divisible by both numbers.
Least Common Multiple (LCM) of 54 and 74 is 1998.
LCM(54,74) = 1998
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 54 and 74. First we will calculate the prime factors of 54 and 74.
Prime Factorization of 54
2 | 54 |
3 | 27 |
3 | 9 |
3 | 3 |
1 |
Prime factors of 54 are 2,3. Prime factorization of 54 in exponential form is:
54 = 21×33
Prime Factorization of 74
2 | 74 |
37 | 37 |
1 |
Prime factors of 74 are 2,37. Prime factorization of 74 in exponential form is:
74 = 21×371
Now multiplying the highest exponent prime factors to calculate the LCM of 54 and 74.
LCM(54,74) = 21×33×371
LCM(54,74) = 1998
Factors of 54
List of positive integer factors of 54 that divides 54 without a remainder.
1, 2, 3, 6, 9, 18, 27, 54
Factors of 74
List of positive integer factors of 74 that divides 74 without a remainder.
1, 2, 37, 74
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 54 and 74, than apply into the LCM equation.
GCF(54,74) = 2
LCM(54,74) = ( 54 × 74) / 2
LCM(54,74) = 3996 / 2
LCM(54,74) = 1998
(i) The LCM of 74 and 54 is associative
LCM of 54 and 74 = LCM of 74 and 54
1. What is the LCM of 54 and 74?
Answer: LCM of 54 and 74 is 1998.
2. What are the Factors of 54?
Answer: Factors of 54 are 1, 2, 3, 6, 9, 18, 27, 54. There are 8 integers that are factors of 54. The greatest factor of 54 is 54.
3. What are the Factors of 74?
Answer: Factors of 74 are 1, 2, 37, 74. There are 4 integers that are factors of 74. The greatest factor of 74 is 74.
4. How to Find the LCM of 54 and 74?
Answer:
Least Common Multiple of 54 and 74 = 1998
Step 1: Find the prime factorization of 54
54 = 2 x 3 x 3 x 3
Step 2: Find the prime factorization of 74
74 = 2 x 37
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 1998 = 2 x 3 x 3 x 3 x 37
Step 4: Therefore, the least common multiple of 54 and 74 is 1998.