Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 7881 and 7887 the smallest integer that is 20719149 that is divisible by both numbers.
Least Common Multiple (LCM) of 7881 and 7887 is 20719149.
LCM(7881,7887) = 20719149
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 7881 and 7887. First we will calculate the prime factors of 7881 and 7887.
Prime Factorization of 7881
3 | 7881 |
37 | 2627 |
71 | 71 |
1 |
Prime factors of 7881 are 3, 37,71. Prime factorization of 7881 in exponential form is:
7881 = 31×371×711
Prime Factorization of 7887
3 | 7887 |
11 | 2629 |
239 | 239 |
1 |
Prime factors of 7887 are 3, 11,239. Prime factorization of 7887 in exponential form is:
7887 = 31×111×2391
Now multiplying the highest exponent prime factors to calculate the LCM of 7881 and 7887.
LCM(7881,7887) = 31×111×371×711×2391
LCM(7881,7887) = 20719149
Factors of 7881
List of positive integer factors of 7881 that divides 7881 without a remainder.
1, 3, 37, 71, 111, 213, 2627, 7881
Factors of 7887
List of positive integer factors of 7887 that divides 7887 without a remainder.
1, 3, 11, 33, 239, 717, 2629, 7887
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7881 and 7887, than apply into the LCM equation.
GCF(7881,7887) = 3
LCM(7881,7887) = ( 7881 × 7887) / 3
LCM(7881,7887) = 62157447 / 3
LCM(7881,7887) = 20719149
(i) The LCM of 7887 and 7881 is associative
LCM of 7881 and 7887 = LCM of 7887 and 7881
1. What is the LCM of 7881 and 7887?
Answer: LCM of 7881 and 7887 is 20719149.
2. What are the Factors of 7881?
Answer: Factors of 7881 are 1, 3, 37, 71, 111, 213, 2627, 7881. There are 8 integers that are factors of 7881. The greatest factor of 7881 is 7881.
3. What are the Factors of 7887?
Answer: Factors of 7887 are 1, 3, 11, 33, 239, 717, 2629, 7887. There are 8 integers that are factors of 7887. The greatest factor of 7887 is 7887.
4. How to Find the LCM of 7881 and 7887?
Answer:
Least Common Multiple of 7881 and 7887 = 20719149
Step 1: Find the prime factorization of 7881
7881 = 3 x 37 x 71
Step 2: Find the prime factorization of 7887
7887 = 3 x 11 x 239
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 20719149 = 3 x 11 x 37 x 71 x 239
Step 4: Therefore, the least common multiple of 7881 and 7887 is 20719149.