Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 7845 and 7851 the smallest integer that is 20530365 that is divisible by both numbers.
Least Common Multiple (LCM) of 7845 and 7851 is 20530365.
LCM(7845,7851) = 20530365
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 7845 and 7851. First we will calculate the prime factors of 7845 and 7851.
Prime Factorization of 7845
3 | 7845 |
5 | 2615 |
523 | 523 |
1 |
Prime factors of 7845 are 3, 5,523. Prime factorization of 7845 in exponential form is:
7845 = 31×51×5231
Prime Factorization of 7851
3 | 7851 |
2617 | 2617 |
1 |
Prime factors of 7851 are 3,2617. Prime factorization of 7851 in exponential form is:
7851 = 31×26171
Now multiplying the highest exponent prime factors to calculate the LCM of 7845 and 7851.
LCM(7845,7851) = 31×51×5231×26171
LCM(7845,7851) = 20530365
Factors of 7845
List of positive integer factors of 7845 that divides 7845 without a remainder.
1, 3, 5, 15, 523, 1569, 2615, 7845
Factors of 7851
List of positive integer factors of 7851 that divides 7851 without a remainder.
1, 3, 2617, 7851
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7845 and 7851, than apply into the LCM equation.
GCF(7845,7851) = 3
LCM(7845,7851) = ( 7845 × 7851) / 3
LCM(7845,7851) = 61591095 / 3
LCM(7845,7851) = 20530365
(i) The LCM of 7851 and 7845 is associative
LCM of 7845 and 7851 = LCM of 7851 and 7845
1. What is the LCM of 7845 and 7851?
Answer: LCM of 7845 and 7851 is 20530365.
2. What are the Factors of 7845?
Answer: Factors of 7845 are 1, 3, 5, 15, 523, 1569, 2615, 7845. There are 8 integers that are factors of 7845. The greatest factor of 7845 is 7845.
3. What are the Factors of 7851?
Answer: Factors of 7851 are 1, 3, 2617, 7851. There are 4 integers that are factors of 7851. The greatest factor of 7851 is 7851.
4. How to Find the LCM of 7845 and 7851?
Answer:
Least Common Multiple of 7845 and 7851 = 20530365
Step 1: Find the prime factorization of 7845
7845 = 3 x 5 x 523
Step 2: Find the prime factorization of 7851
7851 = 3 x 2617
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 20530365 = 3 x 5 x 523 x 2617
Step 4: Therefore, the least common multiple of 7845 and 7851 is 20530365.