Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 3980 and 3985 the smallest integer that is 3172060 that is divisible by both numbers.
Least Common Multiple (LCM) of 3980 and 3985 is 3172060.
LCM(3980,3985) = 3172060
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 3980 and 3985. First we will calculate the prime factors of 3980 and 3985.
Prime Factorization of 3980
2 | 3980 |
2 | 1990 |
5 | 995 |
199 | 199 |
1 |
Prime factors of 3980 are 2, 5,199. Prime factorization of 3980 in exponential form is:
3980 = 22×51×1991
Prime Factorization of 3985
5 | 3985 |
797 | 797 |
1 |
Prime factors of 3985 are 5,797. Prime factorization of 3985 in exponential form is:
3985 = 51×7971
Now multiplying the highest exponent prime factors to calculate the LCM of 3980 and 3985.
LCM(3980,3985) = 22×51×1991×7971
LCM(3980,3985) = 3172060
Factors of 3980
List of positive integer factors of 3980 that divides 3980 without a remainder.
1, 2, 4, 5, 10, 20, 199, 398, 796, 995, 1990, 3980
Factors of 3985
List of positive integer factors of 3985 that divides 3985 without a remainder.
1, 5, 797, 3985
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 3980 and 3985, than apply into the LCM equation.
GCF(3980,3985) = 5
LCM(3980,3985) = ( 3980 × 3985) / 5
LCM(3980,3985) = 15860300 / 5
LCM(3980,3985) = 3172060
(i) The LCM of 3985 and 3980 is associative
LCM of 3980 and 3985 = LCM of 3985 and 3980
1. What is the LCM of 3980 and 3985?
Answer: LCM of 3980 and 3985 is 3172060.
2. What are the Factors of 3980?
Answer: Factors of 3980 are 1, 2, 4, 5, 10, 20, 199, 398, 796, 995, 1990, 3980. There are 12 integers that are factors of 3980. The greatest factor of 3980 is 3980.
3. What are the Factors of 3985?
Answer: Factors of 3985 are 1, 5, 797, 3985. There are 4 integers that are factors of 3985. The greatest factor of 3985 is 3985.
4. How to Find the LCM of 3980 and 3985?
Answer:
Least Common Multiple of 3980 and 3985 = 3172060
Step 1: Find the prime factorization of 3980
3980 = 2 x 2 x 5 x 199
Step 2: Find the prime factorization of 3985
3985 = 5 x 797
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 3172060 = 2 x 2 x 5 x 199 x 797
Step 4: Therefore, the least common multiple of 3980 and 3985 is 3172060.