Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 7990 and 7994 the smallest integer that is 31936030 that is divisible by both numbers.
Least Common Multiple (LCM) of 7990 and 7994 is 31936030.
LCM(7990,7994) = 31936030
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 7990 and 7994. First we will calculate the prime factors of 7990 and 7994.
Prime Factorization of 7990
2 | 7990 |
5 | 3995 |
17 | 799 |
47 | 47 |
1 |
Prime factors of 7990 are 2, 5, 17,47. Prime factorization of 7990 in exponential form is:
7990 = 21×51×171×471
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 7990 and 7994.
LCM(7990,7994) = 21×51×71×171×471×5711
LCM(7990,7994) = 31936030
Factors of 7990
List of positive integer factors of 7990 that divides 7990 without a remainder.
1, 2, 5, 10, 17, 34, 47, 85, 94, 170, 235, 470, 799, 1598, 3995, 7990
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 7990 and 7994, than apply into the LCM equation.
GCF(7990,7994) = 2
LCM(7990,7994) = ( 7990 × 7994) / 2
LCM(7990,7994) = 63872060 / 2
LCM(7990,7994) = 31936030
(i) The LCM of 7994 and 7990 is associative
LCM of 7990 and 7994 = LCM of 7994 and 7990
1. What is the LCM of 7990 and 7994?
Answer: LCM of 7990 and 7994 is 31936030.
2. What are the Factors of 7990?
Answer: Factors of 7990 are 1, 2, 5, 10, 17, 34, 47, 85, 94, 170, 235, 470, 799, 1598, 3995, 7990. There are 16 integers that are factors of 7990. The greatest factor of 7990 is 7990.
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 7990 and 7994?
Answer:
Least Common Multiple of 7990 and 7994 = 31936030
Step 1: Find the prime factorization of 7990
7990 = 2 x 5 x 17 x 47
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 = 31936030 = 2 x 5 x 7 x 17 x 47 x 571
Step 4: Therefore, the least common multiple of 7990 and 7994 is 31936030.