Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 320 and 321 the smallest integer that is 102720 that is divisible by both numbers.
Least Common Multiple (LCM) of 320 and 321 is 102720.
LCM(320,321) = 102720
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 320 and 321. First we will calculate the prime factors of 320 and 321.
Prime Factorization of 320
2 | 320 |
2 | 160 |
2 | 80 |
2 | 40 |
2 | 20 |
2 | 10 |
5 | 5 |
1 |
Prime factors of 320 are 2,5. Prime factorization of 320 in exponential form is:
320 = 26×51
Prime Factorization of 321
3 | 321 |
107 | 107 |
1 |
Prime factors of 321 are 3,107. Prime factorization of 321 in exponential form is:
321 = 31×1071
Now multiplying the highest exponent prime factors to calculate the LCM of 320 and 321.
LCM(320,321) = 26×31×51×1071
LCM(320,321) = 102720
Factors of 320
List of positive integer factors of 320 that divides 320 without a remainder.
1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320
Factors of 321
List of positive integer factors of 321 that divides 321 without a remainder.
1, 3, 107, 321
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 320 and 321, than apply into the LCM equation.
GCF(320,321) = 1
LCM(320,321) = ( 320 × 321) / 1
LCM(320,321) = 102720 / 1
LCM(320,321) = 102720
(i) The LCM of 321 and 320 is associative
LCM of 320 and 321 = LCM of 321 and 320
1. What is the LCM of 320 and 321?
Answer: LCM of 320 and 321 is 102720.
2. What are the Factors of 320?
Answer: Factors of 320 are 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320. There are 14 integers that are factors of 320. The greatest factor of 320 is 320.
3. What are the Factors of 321?
Answer: Factors of 321 are 1, 3, 107, 321. There are 4 integers that are factors of 321. The greatest factor of 321 is 321.
4. How to Find the LCM of 320 and 321?
Answer:
Least Common Multiple of 320 and 321 = 102720
Step 1: Find the prime factorization of 320
320 = 2 x 2 x 2 x 2 x 2 x 2 x 5
Step 2: Find the prime factorization of 321
321 = 3 x 107
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 102720 = 2 x 2 x 2 x 2 x 2 x 2 x 3 x 5 x 107
Step 4: Therefore, the least common multiple of 320 and 321 is 102720.