Least Common Multiple of 2020 and 2021
Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 2020 and 2021 the smallest integer that is 4082420 that is divisible by both numbers.
Least Common Multiple (LCM) of 2020 and 2021 is 4082420.
LCM(2020,2021) = 4082420
LCM of 2020 and 2021
Least common multiple or lowest common denominator (LCD) can be calculated in three ways;
- Least Common Multiple of 2020 and 2021 by Prime method
- Least Common Multiple of 2020 and 2021 with GCF Formula
LCM of 2020 and 2021 is 4082420
Least common multiple can be found by multiplying the highest exponent prime factors of 2020 and 2021. First we will calculate the prime factors of 2020 and 2021.
Prime Factorization of 2020
| 2 | 2020 |
| 2 | 1010 |
| 5 | 505 |
| 101 | 101 |
| 1 |
Prime factors of 2020 are 2, 5,101. Prime factorization of 2020 in exponential form is:
2020 = 22×51×1011
Prime Factorization of 2021
| 43 | 2021 |
| 47 | 47 |
| 1 |
Prime factors of 2021 are 43,47. Prime factorization of 2021 in exponential form is:
2021 = 431×471
Now multiplying the highest exponent prime factors to calculate the LCM of 2020 and 2021.
LCM(2020,2021) = 22×51×431×471×1011
LCM(2020,2021) = 4082420
Factors of 2020
List of positive integer factors of 2020 that divides 2020 without a remainder.
1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020
Factors of 2021
List of positive integer factors of 2021 that divides 2021 without a remainder.
1, 43, 47, 2021
Least Common Multiple of 2020 and 2021 with GCF Formula
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 2020 and 2021, than apply into the LCM equation.
GCF(2020,2021) = 1
LCM(2020,2021) = ( 2020 × 2021) / 1
LCM(2020,2021) = 4082420 / 1
LCM(2020,2021) = 4082420
Properties of LCM 2020 and 2021
(i) The LCM of 2021 and 2020 is associative
LCM of 2020 and 2021 = LCM of 2021 and 2020
Related Least Common Multiples of 2020
Related Least Common Multiples of 2021
Frequently Asked Questions on LCM of 2020 and 2021
1. What is the LCM of 2020 and 2021?
Answer: LCM of 2020 and 2021 is 4082420.
2. What are the Factors of 2020?
Answer: Factors of 2020 are 1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020. There are 12 integers that are factors of 2020. The greatest factor of 2020 is 2020.
3. What are the Factors of 2021?
Answer: Factors of 2021 are 1, 43, 47, 2021. There are 4 integers that are factors of 2021. The greatest factor of 2021 is 2021.
4. How to Find the LCM of 2020 and 2021?
Answer:
Least Common Multiple of 2020 and 2021 = 4082420
Step 1: Find the prime factorization of 2020
2020 = 2 x 2 x 5 x 101
Step 2: Find the prime factorization of 2021
2021 = 43 x 47
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 4082420 = 2 x 2 x 5 x 43 x 47 x 101
Step 4: Therefore, the least common multiple of 2020 and 2021 is 4082420.
