Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 800 and 803 the smallest integer that is 642400 that is divisible by both numbers.
Least Common Multiple (LCM) of 800 and 803 is 642400.
LCM(800,803) = 642400
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 800 and 803. First we will calculate the prime factors of 800 and 803.
Prime Factorization of 800
2 | 800 |
2 | 400 |
2 | 200 |
2 | 100 |
2 | 50 |
5 | 25 |
5 | 5 |
1 |
Prime factors of 800 are 2,5. Prime factorization of 800 in exponential form is:
800 = 25×52
Prime Factorization of 803
11 | 803 |
73 | 73 |
1 |
Prime factors of 803 are 11,73. Prime factorization of 803 in exponential form is:
803 = 111×731
Now multiplying the highest exponent prime factors to calculate the LCM of 800 and 803.
LCM(800,803) = 25×52×111×731
LCM(800,803) = 642400
Factors of 800
List of positive integer factors of 800 that divides 800 without a remainder.
1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 800
Factors of 803
List of positive integer factors of 803 that divides 803 without a remainder.
1, 11, 73, 803
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 800 and 803, than apply into the LCM equation.
GCF(800,803) = 1
LCM(800,803) = ( 800 × 803) / 1
LCM(800,803) = 642400 / 1
LCM(800,803) = 642400
(i) The LCM of 803 and 800 is associative
LCM of 800 and 803 = LCM of 803 and 800
1. What is the LCM of 800 and 803?
Answer: LCM of 800 and 803 is 642400.
2. What are the Factors of 800?
Answer: Factors of 800 are 1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 800. There are 18 integers that are factors of 800. The greatest factor of 800 is 800.
3. What are the Factors of 803?
Answer: Factors of 803 are 1, 11, 73, 803. There are 4 integers that are factors of 803. The greatest factor of 803 is 803.
4. How to Find the LCM of 800 and 803?
Answer:
Least Common Multiple of 800 and 803 = 642400
Step 1: Find the prime factorization of 800
800 = 2 x 2 x 2 x 2 x 2 x 5 x 5
Step 2: Find the prime factorization of 803
803 = 11 x 73
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 642400 = 2 x 2 x 2 x 2 x 2 x 5 x 5 x 11 x 73
Step 4: Therefore, the least common multiple of 800 and 803 is 642400.