Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 3871 and 3878 the smallest integer that is 2144534 that is divisible by both numbers.
Least Common Multiple (LCM) of 3871 and 3878 is 2144534.
LCM(3871,3878) = 2144534
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 3871 and 3878. First we will calculate the prime factors of 3871 and 3878.
Prime Factorization of 3871
7 | 3871 |
7 | 553 |
79 | 79 |
1 |
Prime factors of 3871 are 7,79. Prime factorization of 3871 in exponential form is:
3871 = 72×791
Prime Factorization of 3878
2 | 3878 |
7 | 1939 |
277 | 277 |
1 |
Prime factors of 3878 are 2, 7,277. Prime factorization of 3878 in exponential form is:
3878 = 21×71×2771
Now multiplying the highest exponent prime factors to calculate the LCM of 3871 and 3878.
LCM(3871,3878) = 21×72×791×2771
LCM(3871,3878) = 2144534
Factors of 3871
List of positive integer factors of 3871 that divides 3871 without a remainder.
1, 7, 49, 79, 553, 3871
Factors of 3878
List of positive integer factors of 3878 that divides 3878 without a remainder.
1, 2, 7, 14, 277, 554, 1939, 3878
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 3871 and 3878, than apply into the LCM equation.
GCF(3871,3878) = 7
LCM(3871,3878) = ( 3871 × 3878) / 7
LCM(3871,3878) = 15011738 / 7
LCM(3871,3878) = 2144534
(i) The LCM of 3878 and 3871 is associative
LCM of 3871 and 3878 = LCM of 3878 and 3871
1. What is the LCM of 3871 and 3878?
Answer: LCM of 3871 and 3878 is 2144534.
2. What are the Factors of 3871?
Answer: Factors of 3871 are 1, 7, 49, 79, 553, 3871. There are 6 integers that are factors of 3871. The greatest factor of 3871 is 3871.
3. What are the Factors of 3878?
Answer: Factors of 3878 are 1, 2, 7, 14, 277, 554, 1939, 3878. There are 8 integers that are factors of 3878. The greatest factor of 3878 is 3878.
4. How to Find the LCM of 3871 and 3878?
Answer:
Least Common Multiple of 3871 and 3878 = 2144534
Step 1: Find the prime factorization of 3871
3871 = 7 x 7 x 79
Step 2: Find the prime factorization of 3878
3878 = 2 x 7 x 277
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 2144534 = 2 x 7 x 7 x 79 x 277
Step 4: Therefore, the least common multiple of 3871 and 3878 is 2144534.