Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 1808 and 1815 the smallest integer that is 3281520 that is divisible by both numbers.
Least Common Multiple (LCM) of 1808 and 1815 is 3281520.
LCM(1808,1815) = 3281520
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 1808 and 1815. First we will calculate the prime factors of 1808 and 1815.
Prime Factorization of 1808
2 | 1808 |
2 | 904 |
2 | 452 |
2 | 226 |
113 | 113 |
1 |
Prime factors of 1808 are 2,113. Prime factorization of 1808 in exponential form is:
1808 = 24×1131
Prime Factorization of 1815
3 | 1815 |
5 | 605 |
11 | 121 |
11 | 11 |
1 |
Prime factors of 1815 are 3, 5,11. Prime factorization of 1815 in exponential form is:
1815 = 31×51×112
Now multiplying the highest exponent prime factors to calculate the LCM of 1808 and 1815.
LCM(1808,1815) = 24×31×51×112×1131
LCM(1808,1815) = 3281520
Factors of 1808
List of positive integer factors of 1808 that divides 1808 without a remainder.
1, 2, 4, 8, 16, 113, 226, 452, 904, 1808
Factors of 1815
List of positive integer factors of 1815 that divides 1815 without a remainder.
1, 3, 5, 11, 15, 33, 55, 121, 165, 363, 605, 1815
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1808 and 1815, than apply into the LCM equation.
GCF(1808,1815) = 1
LCM(1808,1815) = ( 1808 × 1815) / 1
LCM(1808,1815) = 3281520 / 1
LCM(1808,1815) = 3281520
(i) The LCM of 1815 and 1808 is associative
LCM of 1808 and 1815 = LCM of 1815 and 1808
1. What is the LCM of 1808 and 1815?
Answer: LCM of 1808 and 1815 is 3281520.
2. What are the Factors of 1808?
Answer: Factors of 1808 are 1, 2, 4, 8, 16, 113, 226, 452, 904, 1808. There are 10 integers that are factors of 1808. The greatest factor of 1808 is 1808.
3. What are the Factors of 1815?
Answer: Factors of 1815 are 1, 3, 5, 11, 15, 33, 55, 121, 165, 363, 605, 1815. There are 12 integers that are factors of 1815. The greatest factor of 1815 is 1815.
4. How to Find the LCM of 1808 and 1815?
Answer:
Least Common Multiple of 1808 and 1815 = 3281520
Step 1: Find the prime factorization of 1808
1808 = 2 x 2 x 2 x 2 x 113
Step 2: Find the prime factorization of 1815
1815 = 3 x 5 x 11 x 11
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 3281520 = 2 x 2 x 2 x 2 x 3 x 5 x 11 x 11 x 113
Step 4: Therefore, the least common multiple of 1808 and 1815 is 3281520.