Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 3976 and 3981 the smallest integer that is 15828456 that is divisible by both numbers.
Least Common Multiple (LCM) of 3976 and 3981 is 15828456.
LCM(3976,3981) = 15828456
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 3976 and 3981. First we will calculate the prime factors of 3976 and 3981.
Prime Factorization of 3976
2 | 3976 |
2 | 1988 |
2 | 994 |
7 | 497 |
71 | 71 |
1 |
Prime factors of 3976 are 2, 7,71. Prime factorization of 3976 in exponential form is:
3976 = 23×71×711
Prime Factorization of 3981
3 | 3981 |
1327 | 1327 |
1 |
Prime factors of 3981 are 3,1327. Prime factorization of 3981 in exponential form is:
3981 = 31×13271
Now multiplying the highest exponent prime factors to calculate the LCM of 3976 and 3981.
LCM(3976,3981) = 23×31×71×711×13271
LCM(3976,3981) = 15828456
Factors of 3976
List of positive integer factors of 3976 that divides 3976 without a remainder.
1, 2, 4, 7, 8, 14, 28, 56, 71, 142, 284, 497, 568, 994, 1988, 3976
Factors of 3981
List of positive integer factors of 3981 that divides 3981 without a remainder.
1, 3, 1327, 3981
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 3976 and 3981, than apply into the LCM equation.
GCF(3976,3981) = 1
LCM(3976,3981) = ( 3976 × 3981) / 1
LCM(3976,3981) = 15828456 / 1
LCM(3976,3981) = 15828456
(i) The LCM of 3981 and 3976 is associative
LCM of 3976 and 3981 = LCM of 3981 and 3976
1. What is the LCM of 3976 and 3981?
Answer: LCM of 3976 and 3981 is 15828456.
2. What are the Factors of 3976?
Answer: Factors of 3976 are 1, 2, 4, 7, 8, 14, 28, 56, 71, 142, 284, 497, 568, 994, 1988, 3976. There are 16 integers that are factors of 3976. The greatest factor of 3976 is 3976.
3. What are the Factors of 3981?
Answer: Factors of 3981 are 1, 3, 1327, 3981. There are 4 integers that are factors of 3981. The greatest factor of 3981 is 3981.
4. How to Find the LCM of 3976 and 3981?
Answer:
Least Common Multiple of 3976 and 3981 = 15828456
Step 1: Find the prime factorization of 3976
3976 = 2 x 2 x 2 x 7 x 71
Step 2: Find the prime factorization of 3981
3981 = 3 x 1327
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 15828456 = 2 x 2 x 2 x 3 x 7 x 71 x 1327
Step 4: Therefore, the least common multiple of 3976 and 3981 is 15828456.