Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 1385 and 1390 the smallest integer that is 385030 that is divisible by both numbers.
Least Common Multiple (LCM) of 1385 and 1390 is 385030.
LCM(1385,1390) = 385030
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 1385 and 1390. First we will calculate the prime factors of 1385 and 1390.
Prime Factorization of 1385
5 | 1385 |
277 | 277 |
1 |
Prime factors of 1385 are 5,277. Prime factorization of 1385 in exponential form is:
1385 = 51×2771
Prime Factorization of 1390
2 | 1390 |
5 | 695 |
139 | 139 |
1 |
Prime factors of 1390 are 2, 5,139. Prime factorization of 1390 in exponential form is:
1390 = 21×51×1391
Now multiplying the highest exponent prime factors to calculate the LCM of 1385 and 1390.
LCM(1385,1390) = 21×51×1391×2771
LCM(1385,1390) = 385030
Factors of 1385
List of positive integer factors of 1385 that divides 1385 without a remainder.
1, 5, 277, 1385
Factors of 1390
List of positive integer factors of 1390 that divides 1390 without a remainder.
1, 2, 5, 10, 139, 278, 695, 1390
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1385 and 1390, than apply into the LCM equation.
GCF(1385,1390) = 5
LCM(1385,1390) = ( 1385 × 1390) / 5
LCM(1385,1390) = 1925150 / 5
LCM(1385,1390) = 385030
(i) The LCM of 1390 and 1385 is associative
LCM of 1385 and 1390 = LCM of 1390 and 1385
1. What is the LCM of 1385 and 1390?
Answer: LCM of 1385 and 1390 is 385030.
2. What are the Factors of 1385?
Answer: Factors of 1385 are 1, 5, 277, 1385. There are 4 integers that are factors of 1385. The greatest factor of 1385 is 1385.
3. What are the Factors of 1390?
Answer: Factors of 1390 are 1, 2, 5, 10, 139, 278, 695, 1390. There are 8 integers that are factors of 1390. The greatest factor of 1390 is 1390.
4. How to Find the LCM of 1385 and 1390?
Answer:
Least Common Multiple of 1385 and 1390 = 385030
Step 1: Find the prime factorization of 1385
1385 = 5 x 277
Step 2: Find the prime factorization of 1390
1390 = 2 x 5 x 139
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 385030 = 2 x 5 x 139 x 277
Step 4: Therefore, the least common multiple of 1385 and 1390 is 385030.