Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 725 and 728 the smallest integer that is 527800 that is divisible by both numbers.
Least Common Multiple (LCM) of 725 and 728 is 527800.
LCM(725,728) = 527800
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 725 and 728. First we will calculate the prime factors of 725 and 728.
Prime Factorization of 725
5 | 725 |
5 | 145 |
29 | 29 |
1 |
Prime factors of 725 are 5,29. Prime factorization of 725 in exponential form is:
725 = 52×291
Prime Factorization of 728
2 | 728 |
2 | 364 |
2 | 182 |
7 | 91 |
13 | 13 |
1 |
Prime factors of 728 are 2, 7,13. Prime factorization of 728 in exponential form is:
728 = 23×71×131
Now multiplying the highest exponent prime factors to calculate the LCM of 725 and 728.
LCM(725,728) = 23×52×71×131×291
LCM(725,728) = 527800
Factors of 725
List of positive integer factors of 725 that divides 725 without a remainder.
1, 5, 25, 29, 145, 725
Factors of 728
List of positive integer factors of 728 that divides 728 without a remainder.
1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364, 728
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 725 and 728, than apply into the LCM equation.
GCF(725,728) = 1
LCM(725,728) = ( 725 × 728) / 1
LCM(725,728) = 527800 / 1
LCM(725,728) = 527800
(i) The LCM of 728 and 725 is associative
LCM of 725 and 728 = LCM of 728 and 725
1. What is the LCM of 725 and 728?
Answer: LCM of 725 and 728 is 527800.
2. What are the Factors of 725?
Answer: Factors of 725 are 1, 5, 25, 29, 145, 725. There are 6 integers that are factors of 725. The greatest factor of 725 is 725.
3. What are the Factors of 728?
Answer: Factors of 728 are 1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364, 728. There are 16 integers that are factors of 728. The greatest factor of 728 is 728.
4. How to Find the LCM of 725 and 728?
Answer:
Least Common Multiple of 725 and 728 = 527800
Step 1: Find the prime factorization of 725
725 = 5 x 5 x 29
Step 2: Find the prime factorization of 728
728 = 2 x 2 x 2 x 7 x 13
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 527800 = 2 x 2 x 2 x 5 x 5 x 7 x 13 x 29
Step 4: Therefore, the least common multiple of 725 and 728 is 527800.