Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 30 and 43 the smallest integer that is 1290 that is divisible by both numbers.
Least Common Multiple (LCM) of 30 and 43 is 1290.
LCM(30,43) = 1290
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 30 and 43. First we will calculate the prime factors of 30 and 43.
Prime Factorization of 30
2 | 30 |
3 | 15 |
5 | 5 |
1 |
Prime factors of 30 are 2, 3,5. Prime factorization of 30 in exponential form is:
30 = 21×31×51
Prime Factorization of 43
43 | 43 |
1 |
Prime factors of 43 are 43. Prime factorization of 43 in exponential form is:
43 = 431
Now multiplying the highest exponent prime factors to calculate the LCM of 30 and 43.
LCM(30,43) = 21×31×51×431
LCM(30,43) = 1290
Factors of 30
List of positive integer factors of 30 that divides 30 without a remainder.
1, 2, 3, 5, 6, 10, 15, 30
Factors of 43
List of positive integer factors of 43 that divides 43 without a remainder.
1, 43
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 30 and 43, than apply into the LCM equation.
GCF(30,43) = 1
LCM(30,43) = ( 30 × 43) / 1
LCM(30,43) = 1290 / 1
LCM(30,43) = 1290
(i) The LCM of 43 and 30 is associative
LCM of 30 and 43 = LCM of 43 and 30
1. What is the LCM of 30 and 43?
Answer: LCM of 30 and 43 is 1290.
2. What are the Factors of 30?
Answer: Factors of 30 are 1, 2, 3, 5, 6, 10, 15, 30. There are 8 integers that are factors of 30. The greatest factor of 30 is 30.
3. What are the Factors of 43?
Answer: Factors of 43 are 1, 43. There are 2 integers that are factors of 43. The greatest factor of 43 is 43.
4. How to Find the LCM of 30 and 43?
Answer:
Least Common Multiple of 30 and 43 = 1290
Step 1: Find the prime factorization of 30
30 = 2 x 3 x 5
Step 2: Find the prime factorization of 43
43 = 43
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 1290 = 2 x 3 x 5 x 43
Step 4: Therefore, the least common multiple of 30 and 43 is 1290.