Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 831 and 838 the smallest integer that is 696378 that is divisible by both numbers.
Least Common Multiple (LCM) of 831 and 838 is 696378.
LCM(831,838) = 696378
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 831 and 838. First we will calculate the prime factors of 831 and 838.
Prime Factorization of 831
3 | 831 |
277 | 277 |
1 |
Prime factors of 831 are 3,277. Prime factorization of 831 in exponential form is:
831 = 31×2771
Prime Factorization of 838
2 | 838 |
419 | 419 |
1 |
Prime factors of 838 are 2,419. Prime factorization of 838 in exponential form is:
838 = 21×4191
Now multiplying the highest exponent prime factors to calculate the LCM of 831 and 838.
LCM(831,838) = 21×31×2771×4191
LCM(831,838) = 696378
Factors of 831
List of positive integer factors of 831 that divides 831 without a remainder.
1, 3, 277, 831
Factors of 838
List of positive integer factors of 838 that divides 838 without a remainder.
1, 2, 419, 838
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 831 and 838, than apply into the LCM equation.
GCF(831,838) = 1
LCM(831,838) = ( 831 × 838) / 1
LCM(831,838) = 696378 / 1
LCM(831,838) = 696378
(i) The LCM of 838 and 831 is associative
LCM of 831 and 838 = LCM of 838 and 831
1. What is the LCM of 831 and 838?
Answer: LCM of 831 and 838 is 696378.
2. What are the Factors of 831?
Answer: Factors of 831 are 1, 3, 277, 831. There are 4 integers that are factors of 831. The greatest factor of 831 is 831.
3. What are the Factors of 838?
Answer: Factors of 838 are 1, 2, 419, 838. There are 4 integers that are factors of 838. The greatest factor of 838 is 838.
4. How to Find the LCM of 831 and 838?
Answer:
Least Common Multiple of 831 and 838 = 696378
Step 1: Find the prime factorization of 831
831 = 3 x 277
Step 2: Find the prime factorization of 838
838 = 2 x 419
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 696378 = 2 x 3 x 277 x 419
Step 4: Therefore, the least common multiple of 831 and 838 is 696378.