Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 315 and 318 the smallest integer that is 33390 that is divisible by both numbers.
Least Common Multiple (LCM) of 315 and 318 is 33390.
LCM(315,318) = 33390
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 315 and 318. First we will calculate the prime factors of 315 and 318.
Prime Factorization of 315
3 | 315 |
3 | 105 |
5 | 35 |
7 | 7 |
1 |
Prime factors of 315 are 3, 5,7. Prime factorization of 315 in exponential form is:
315 = 32×51×71
Prime Factorization of 318
2 | 318 |
3 | 159 |
53 | 53 |
1 |
Prime factors of 318 are 2, 3,53. Prime factorization of 318 in exponential form is:
318 = 21×31×531
Now multiplying the highest exponent prime factors to calculate the LCM of 315 and 318.
LCM(315,318) = 21×32×51×71×531
LCM(315,318) = 33390
Factors of 315
List of positive integer factors of 315 that divides 315 without a remainder.
1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315
Factors of 318
List of positive integer factors of 318 that divides 318 without a remainder.
1, 2, 3, 6, 53, 106, 159, 318
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 315 and 318, than apply into the LCM equation.
GCF(315,318) = 3
LCM(315,318) = ( 315 × 318) / 3
LCM(315,318) = 100170 / 3
LCM(315,318) = 33390
(i) The LCM of 318 and 315 is associative
LCM of 315 and 318 = LCM of 318 and 315
1. What is the LCM of 315 and 318?
Answer: LCM of 315 and 318 is 33390.
2. What are the Factors of 315?
Answer: Factors of 315 are 1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315. There are 12 integers that are factors of 315. The greatest factor of 315 is 315.
3. What are the Factors of 318?
Answer: Factors of 318 are 1, 2, 3, 6, 53, 106, 159, 318. There are 8 integers that are factors of 318. The greatest factor of 318 is 318.
4. How to Find the LCM of 315 and 318?
Answer:
Least Common Multiple of 315 and 318 = 33390
Step 1: Find the prime factorization of 315
315 = 3 x 3 x 5 x 7
Step 2: Find the prime factorization of 318
318 = 2 x 3 x 53
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 33390 = 2 x 3 x 3 x 5 x 7 x 53
Step 4: Therefore, the least common multiple of 315 and 318 is 33390.