Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 1980 and 1982 the smallest integer that is 1962180 that is divisible by both numbers.
Least Common Multiple (LCM) of 1980 and 1982 is 1962180.
LCM(1980,1982) = 1962180
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 1980 and 1982. First we will calculate the prime factors of 1980 and 1982.
Prime Factorization of 1980
2 | 1980 |
2 | 990 |
3 | 495 |
3 | 165 |
5 | 55 |
11 | 11 |
1 |
Prime factors of 1980 are 2, 3, 5,11. Prime factorization of 1980 in exponential form is:
1980 = 22×32×51×111
Prime Factorization of 1982
2 | 1982 |
991 | 991 |
1 |
Prime factors of 1982 are 2,991. Prime factorization of 1982 in exponential form is:
1982 = 21×9911
Now multiplying the highest exponent prime factors to calculate the LCM of 1980 and 1982.
LCM(1980,1982) = 22×32×51×111×9911
LCM(1980,1982) = 1962180
Factors of 1980
List of positive integer factors of 1980 that divides 1980 without a remainder.
1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980
Factors of 1982
List of positive integer factors of 1982 that divides 1982 without a remainder.
1, 2, 991, 1982
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1980 and 1982, than apply into the LCM equation.
GCF(1980,1982) = 2
LCM(1980,1982) = ( 1980 × 1982) / 2
LCM(1980,1982) = 3924360 / 2
LCM(1980,1982) = 1962180
(i) The LCM of 1982 and 1980 is associative
LCM of 1980 and 1982 = LCM of 1982 and 1980
1. What is the LCM of 1980 and 1982?
Answer: LCM of 1980 and 1982 is 1962180.
2. What are the Factors of 1980?
Answer: Factors of 1980 are 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980. There are 36 integers that are factors of 1980. The greatest factor of 1980 is 1980.
3. What are the Factors of 1982?
Answer: Factors of 1982 are 1, 2, 991, 1982. There are 4 integers that are factors of 1982. The greatest factor of 1982 is 1982.
4. How to Find the LCM of 1980 and 1982?
Answer:
Least Common Multiple of 1980 and 1982 = 1962180
Step 1: Find the prime factorization of 1980
1980 = 2 x 2 x 3 x 3 x 5 x 11
Step 2: Find the prime factorization of 1982
1982 = 2 x 991
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 1962180 = 2 x 2 x 3 x 3 x 5 x 11 x 991
Step 4: Therefore, the least common multiple of 1980 and 1982 is 1962180.