Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 869 and 872 the smallest integer that is 757768 that is divisible by both numbers.
Least Common Multiple (LCM) of 869 and 872 is 757768.
LCM(869,872) = 757768
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 869 and 872. First we will calculate the prime factors of 869 and 872.
Prime Factorization of 869
11 | 869 |
79 | 79 |
1 |
Prime factors of 869 are 11,79. Prime factorization of 869 in exponential form is:
869 = 111×791
Prime Factorization of 872
2 | 872 |
2 | 436 |
2 | 218 |
109 | 109 |
1 |
Prime factors of 872 are 2,109. Prime factorization of 872 in exponential form is:
872 = 23×1091
Now multiplying the highest exponent prime factors to calculate the LCM of 869 and 872.
LCM(869,872) = 23×111×791×1091
LCM(869,872) = 757768
Factors of 869
List of positive integer factors of 869 that divides 869 without a remainder.
1, 11, 79, 869
Factors of 872
List of positive integer factors of 872 that divides 872 without a remainder.
1, 2, 4, 8, 109, 218, 436, 872
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 869 and 872, than apply into the LCM equation.
GCF(869,872) = 1
LCM(869,872) = ( 869 × 872) / 1
LCM(869,872) = 757768 / 1
LCM(869,872) = 757768
(i) The LCM of 872 and 869 is associative
LCM of 869 and 872 = LCM of 872 and 869
1. What is the LCM of 869 and 872?
Answer: LCM of 869 and 872 is 757768.
2. What are the Factors of 869?
Answer: Factors of 869 are 1, 11, 79, 869. There are 4 integers that are factors of 869. The greatest factor of 869 is 869.
3. What are the Factors of 872?
Answer: Factors of 872 are 1, 2, 4, 8, 109, 218, 436, 872. There are 8 integers that are factors of 872. The greatest factor of 872 is 872.
4. How to Find the LCM of 869 and 872?
Answer:
Least Common Multiple of 869 and 872 = 757768
Step 1: Find the prime factorization of 869
869 = 11 x 79
Step 2: Find the prime factorization of 872
872 = 2 x 2 x 2 x 109
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 757768 = 2 x 2 x 2 x 11 x 79 x 109
Step 4: Therefore, the least common multiple of 869 and 872 is 757768.