Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 8987 and 8991 the smallest integer that is 80802117 that is divisible by both numbers.
Least Common Multiple (LCM) of 8987 and 8991 is 80802117.
LCM(8987,8991) = 80802117
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 8987 and 8991. First we will calculate the prime factors of 8987 and 8991.
Prime Factorization of 8987
11 | 8987 |
19 | 817 |
43 | 43 |
1 |
Prime factors of 8987 are 11, 19,43. Prime factorization of 8987 in exponential form is:
8987 = 111×191×431
Prime Factorization of 8991
3 | 8991 |
3 | 2997 |
3 | 999 |
3 | 333 |
3 | 111 |
37 | 37 |
1 |
Prime factors of 8991 are 3,37. Prime factorization of 8991 in exponential form is:
8991 = 35×371
Now multiplying the highest exponent prime factors to calculate the LCM of 8987 and 8991.
LCM(8987,8991) = 35×111×191×371×431
LCM(8987,8991) = 80802117
Factors of 8987
List of positive integer factors of 8987 that divides 8987 without a remainder.
1, 11, 19, 43, 209, 473, 817, 8987
Factors of 8991
List of positive integer factors of 8991 that divides 8991 without a remainder.
1, 3, 9, 27, 37, 81, 111, 243, 333, 999, 2997, 8991
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 8987 and 8991, than apply into the LCM equation.
GCF(8987,8991) = 1
LCM(8987,8991) = ( 8987 × 8991) / 1
LCM(8987,8991) = 80802117 / 1
LCM(8987,8991) = 80802117
(i) The LCM of 8991 and 8987 is associative
LCM of 8987 and 8991 = LCM of 8991 and 8987
1. What is the LCM of 8987 and 8991?
Answer: LCM of 8987 and 8991 is 80802117.
2. What are the Factors of 8987?
Answer: Factors of 8987 are 1, 11, 19, 43, 209, 473, 817, 8987. There are 8 integers that are factors of 8987. The greatest factor of 8987 is 8987.
3. What are the Factors of 8991?
Answer: Factors of 8991 are 1, 3, 9, 27, 37, 81, 111, 243, 333, 999, 2997, 8991. There are 12 integers that are factors of 8991. The greatest factor of 8991 is 8991.
4. How to Find the LCM of 8987 and 8991?
Answer:
Least Common Multiple of 8987 and 8991 = 80802117
Step 1: Find the prime factorization of 8987
8987 = 11 x 19 x 43
Step 2: Find the prime factorization of 8991
8991 = 3 x 3 x 3 x 3 x 3 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 = 80802117 = 3 x 3 x 3 x 3 x 3 x 11 x 19 x 37 x 43
Step 4: Therefore, the least common multiple of 8987 and 8991 is 80802117.