Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 820 and 824 the smallest integer that is 168920 that is divisible by both numbers.
Least Common Multiple (LCM) of 820 and 824 is 168920.
LCM(820,824) = 168920
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 820 and 824. First we will calculate the prime factors of 820 and 824.
Prime Factorization of 820
2 | 820 |
2 | 410 |
5 | 205 |
41 | 41 |
1 |
Prime factors of 820 are 2, 5,41. Prime factorization of 820 in exponential form is:
820 = 22×51×411
Prime Factorization of 824
2 | 824 |
2 | 412 |
2 | 206 |
103 | 103 |
1 |
Prime factors of 824 are 2,103. Prime factorization of 824 in exponential form is:
824 = 23×1031
Now multiplying the highest exponent prime factors to calculate the LCM of 820 and 824.
LCM(820,824) = 23×51×411×1031
LCM(820,824) = 168920
Factors of 820
List of positive integer factors of 820 that divides 820 without a remainder.
1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820
Factors of 824
List of positive integer factors of 824 that divides 824 without a remainder.
1, 2, 4, 8, 103, 206, 412, 824
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 820 and 824, than apply into the LCM equation.
GCF(820,824) = 4
LCM(820,824) = ( 820 × 824) / 4
LCM(820,824) = 675680 / 4
LCM(820,824) = 168920
(i) The LCM of 824 and 820 is associative
LCM of 820 and 824 = LCM of 824 and 820
1. What is the LCM of 820 and 824?
Answer: LCM of 820 and 824 is 168920.
2. What are the Factors of 820?
Answer: Factors of 820 are 1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820. There are 12 integers that are factors of 820. The greatest factor of 820 is 820.
3. What are the Factors of 824?
Answer: Factors of 824 are 1, 2, 4, 8, 103, 206, 412, 824. There are 8 integers that are factors of 824. The greatest factor of 824 is 824.
4. How to Find the LCM of 820 and 824?
Answer:
Least Common Multiple of 820 and 824 = 168920
Step 1: Find the prime factorization of 820
820 = 2 x 2 x 5 x 41
Step 2: Find the prime factorization of 824
824 = 2 x 2 x 2 x 103
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 168920 = 2 x 2 x 2 x 5 x 41 x 103
Step 4: Therefore, the least common multiple of 820 and 824 is 168920.