Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 112 and 120 the smallest integer that is 1680 that is divisible by both numbers.
Least Common Multiple (LCM) of 112 and 120 is 1680.
LCM(112,120) = 1680
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 112 and 120. First we will calculate the prime factors of 112 and 120.
Prime Factorization of 112
2 | 112 |
2 | 56 |
2 | 28 |
2 | 14 |
7 | 7 |
1 |
Prime factors of 112 are 2,7. Prime factorization of 112 in exponential form is:
112 = 24×71
Prime Factorization of 120
2 | 120 |
2 | 60 |
2 | 30 |
3 | 15 |
5 | 5 |
1 |
Prime factors of 120 are 2, 3,5. Prime factorization of 120 in exponential form is:
120 = 23×31×51
Now multiplying the highest exponent prime factors to calculate the LCM of 112 and 120.
LCM(112,120) = 24×31×51×71
LCM(112,120) = 1680
Factors of 112
List of positive integer factors of 112 that divides 112 without a remainder.
1, 2, 4, 7, 8, 14, 16, 28, 56, 112
Factors of 120
List of positive integer factors of 120 that divides 120 without a remainder.
1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 112 and 120, than apply into the LCM equation.
GCF(112,120) = 8
LCM(112,120) = ( 112 × 120) / 8
LCM(112,120) = 13440 / 8
LCM(112,120) = 1680
(i) The LCM of 120 and 112 is associative
LCM of 112 and 120 = LCM of 120 and 112
1. What is the LCM of 112 and 120?
Answer: LCM of 112 and 120 is 1680.
2. What are the Factors of 112?
Answer: Factors of 112 are 1, 2, 4, 7, 8, 14, 16, 28, 56, 112. There are 10 integers that are factors of 112. The greatest factor of 112 is 112.
3. What are the Factors of 120?
Answer: Factors of 120 are 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120. There are 16 integers that are factors of 120. The greatest factor of 120 is 120.
4. How to Find the LCM of 112 and 120?
Answer:
Least Common Multiple of 112 and 120 = 1680
Step 1: Find the prime factorization of 112
112 = 2 x 2 x 2 x 2 x 7
Step 2: Find the prime factorization of 120
120 = 2 x 2 x 2 x 3 x 5
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 1680 = 2 x 2 x 2 x 2 x 3 x 5 x 7
Step 4: Therefore, the least common multiple of 112 and 120 is 1680.