Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 1885 and 1890 the smallest integer that is 712530 that is divisible by both numbers.
Least Common Multiple (LCM) of 1885 and 1890 is 712530.
LCM(1885,1890) = 712530
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 1885 and 1890. First we will calculate the prime factors of 1885 and 1890.
Prime Factorization of 1885
5 | 1885 |
13 | 377 |
29 | 29 |
1 |
Prime factors of 1885 are 5, 13,29. Prime factorization of 1885 in exponential form is:
1885 = 51×131×291
Prime Factorization of 1890
2 | 1890 |
3 | 945 |
3 | 315 |
3 | 105 |
5 | 35 |
7 | 7 |
1 |
Prime factors of 1890 are 2, 3, 5,7. Prime factorization of 1890 in exponential form is:
1890 = 21×33×51×71
Now multiplying the highest exponent prime factors to calculate the LCM of 1885 and 1890.
LCM(1885,1890) = 21×33×51×71×131×291
LCM(1885,1890) = 712530
Factors of 1885
List of positive integer factors of 1885 that divides 1885 without a remainder.
1, 5, 13, 29, 65, 145, 377, 1885
Factors of 1890
List of positive integer factors of 1890 that divides 1890 without a remainder.
1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 42, 45, 54, 63, 70, 90, 105, 126, 135, 189, 210, 270, 315, 378, 630, 945, 1890
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1885 and 1890, than apply into the LCM equation.
GCF(1885,1890) = 5
LCM(1885,1890) = ( 1885 × 1890) / 5
LCM(1885,1890) = 3562650 / 5
LCM(1885,1890) = 712530
(i) The LCM of 1890 and 1885 is associative
LCM of 1885 and 1890 = LCM of 1890 and 1885
1. What is the LCM of 1885 and 1890?
Answer: LCM of 1885 and 1890 is 712530.
2. What are the Factors of 1885?
Answer: Factors of 1885 are 1, 5, 13, 29, 65, 145, 377, 1885. There are 8 integers that are factors of 1885. The greatest factor of 1885 is 1885.
3. What are the Factors of 1890?
Answer: Factors of 1890 are 1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 42, 45, 54, 63, 70, 90, 105, 126, 135, 189, 210, 270, 315, 378, 630, 945, 1890. There are 32 integers that are factors of 1890. The greatest factor of 1890 is 1890.
4. How to Find the LCM of 1885 and 1890?
Answer:
Least Common Multiple of 1885 and 1890 = 712530
Step 1: Find the prime factorization of 1885
1885 = 5 x 13 x 29
Step 2: Find the prime factorization of 1890
1890 = 2 x 3 x 3 x 3 x 5 x 7
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 712530 = 2 x 3 x 3 x 3 x 5 x 7 x 13 x 29
Step 4: Therefore, the least common multiple of 1885 and 1890 is 712530.