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 801 the smallest integer that is 640800 that is divisible by both numbers.
Least Common Multiple (LCM) of 800 and 801 is 640800.
LCM(800,801) = 640800
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 801. First we will calculate the prime factors of 800 and 801.
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 801
3 | 801 |
3 | 267 |
89 | 89 |
1 |
Prime factors of 801 are 3,89. Prime factorization of 801 in exponential form is:
801 = 32×891
Now multiplying the highest exponent prime factors to calculate the LCM of 800 and 801.
LCM(800,801) = 25×32×52×891
LCM(800,801) = 640800
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 801
List of positive integer factors of 801 that divides 801 without a remainder.
1, 3, 9, 89, 267, 801
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 800 and 801, than apply into the LCM equation.
GCF(800,801) = 1
LCM(800,801) = ( 800 × 801) / 1
LCM(800,801) = 640800 / 1
LCM(800,801) = 640800
(i) The LCM of 801 and 800 is associative
LCM of 800 and 801 = LCM of 801 and 800
1. What is the LCM of 800 and 801?
Answer: LCM of 800 and 801 is 640800.
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 801?
Answer: Factors of 801 are 1, 3, 9, 89, 267, 801. There are 6 integers that are factors of 801. The greatest factor of 801 is 801.
4. How to Find the LCM of 800 and 801?
Answer:
Least Common Multiple of 800 and 801 = 640800
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 801
801 = 3 x 3 x 89
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 640800 = 2 x 2 x 2 x 2 x 2 x 3 x 3 x 5 x 5 x 89
Step 4: Therefore, the least common multiple of 800 and 801 is 640800.