Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 7986 and 7994 the smallest integer that is 31920042 that is divisible by both numbers.
Least Common Multiple (LCM) of 7986 and 7994 is 31920042.
LCM(7986,7994) = 31920042
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 7986 and 7994. First we will calculate the prime factors of 7986 and 7994.
Prime Factorization of 7986
2 | 7986 |
3 | 3993 |
11 | 1331 |
11 | 121 |
11 | 11 |
1 |
Prime factors of 7986 are 2, 3,11. Prime factorization of 7986 in exponential form is:
7986 = 21×31×113
Prime Factorization of 7994
2 | 7994 |
7 | 3997 |
571 | 571 |
1 |
Prime factors of 7994 are 2, 7,571. Prime factorization of 7994 in exponential form is:
7994 = 21×71×5711
Now multiplying the highest exponent prime factors to calculate the LCM of 7986 and 7994.
LCM(7986,7994) = 21×31×71×113×5711
LCM(7986,7994) = 31920042
Factors of 7986
List of positive integer factors of 7986 that divides 7986 without a remainder.
1, 2, 3, 6, 11, 22, 33, 66, 121, 242, 363, 726, 1331, 2662, 3993, 7986
Factors of 7994
List of positive integer factors of 7994 that divides 7994 without a remainder.
1, 2, 7, 14, 571, 1142, 3997, 7994
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7986 and 7994, than apply into the LCM equation.
GCF(7986,7994) = 2
LCM(7986,7994) = ( 7986 × 7994) / 2
LCM(7986,7994) = 63840084 / 2
LCM(7986,7994) = 31920042
(i) The LCM of 7994 and 7986 is associative
LCM of 7986 and 7994 = LCM of 7994 and 7986
1. What is the LCM of 7986 and 7994?
Answer: LCM of 7986 and 7994 is 31920042.
2. What are the Factors of 7986?
Answer: Factors of 7986 are 1, 2, 3, 6, 11, 22, 33, 66, 121, 242, 363, 726, 1331, 2662, 3993, 7986. There are 16 integers that are factors of 7986. The greatest factor of 7986 is 7986.
3. What are the Factors of 7994?
Answer: Factors of 7994 are 1, 2, 7, 14, 571, 1142, 3997, 7994. There are 8 integers that are factors of 7994. The greatest factor of 7994 is 7994.
4. How to Find the LCM of 7986 and 7994?
Answer:
Least Common Multiple of 7986 and 7994 = 31920042
Step 1: Find the prime factorization of 7986
7986 = 2 x 3 x 11 x 11 x 11
Step 2: Find the prime factorization of 7994
7994 = 2 x 7 x 571
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 31920042 = 2 x 3 x 7 x 11 x 11 x 11 x 571
Step 4: Therefore, the least common multiple of 7986 and 7994 is 31920042.