Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 115 and 117 the smallest integer that is 13455 that is divisible by both numbers.
Least Common Multiple (LCM) of 115 and 117 is 13455.
LCM(115,117) = 13455
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 115 and 117. First we will calculate the prime factors of 115 and 117.
Prime Factorization of 115
5 | 115 |
23 | 23 |
1 |
Prime factors of 115 are 5,23. Prime factorization of 115 in exponential form is:
115 = 51×231
Prime Factorization of 117
3 | 117 |
3 | 39 |
13 | 13 |
1 |
Prime factors of 117 are 3,13. Prime factorization of 117 in exponential form is:
117 = 32×131
Now multiplying the highest exponent prime factors to calculate the LCM of 115 and 117.
LCM(115,117) = 32×51×131×231
LCM(115,117) = 13455
Factors of 115
List of positive integer factors of 115 that divides 115 without a remainder.
1, 5, 23, 115
Factors of 117
List of positive integer factors of 117 that divides 117 without a remainder.
1, 3, 9, 13, 39, 117
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 115 and 117, than apply into the LCM equation.
GCF(115,117) = 1
LCM(115,117) = ( 115 × 117) / 1
LCM(115,117) = 13455 / 1
LCM(115,117) = 13455
(i) The LCM of 117 and 115 is associative
LCM of 115 and 117 = LCM of 117 and 115
1. What is the LCM of 115 and 117?
Answer: LCM of 115 and 117 is 13455.
2. What are the Factors of 115?
Answer: Factors of 115 are 1, 5, 23, 115. There are 4 integers that are factors of 115. The greatest factor of 115 is 115.
3. What are the Factors of 117?
Answer: Factors of 117 are 1, 3, 9, 13, 39, 117. There are 6 integers that are factors of 117. The greatest factor of 117 is 117.
4. How to Find the LCM of 115 and 117?
Answer:
Least Common Multiple of 115 and 117 = 13455
Step 1: Find the prime factorization of 115
115 = 5 x 23
Step 2: Find the prime factorization of 117
117 = 3 x 3 x 13
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 13455 = 3 x 3 x 5 x 13 x 23
Step 4: Therefore, the least common multiple of 115 and 117 is 13455.