Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 656 and 663 the smallest integer that is 434928 that is divisible by both numbers.
Least Common Multiple (LCM) of 656 and 663 is 434928.
LCM(656,663) = 434928
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 656 and 663. First we will calculate the prime factors of 656 and 663.
Prime Factorization of 656
2 | 656 |
2 | 328 |
2 | 164 |
2 | 82 |
41 | 41 |
1 |
Prime factors of 656 are 2,41. Prime factorization of 656 in exponential form is:
656 = 24×411
Prime Factorization of 663
3 | 663 |
13 | 221 |
17 | 17 |
1 |
Prime factors of 663 are 3, 13,17. Prime factorization of 663 in exponential form is:
663 = 31×131×171
Now multiplying the highest exponent prime factors to calculate the LCM of 656 and 663.
LCM(656,663) = 24×31×131×171×411
LCM(656,663) = 434928
Factors of 656
List of positive integer factors of 656 that divides 656 without a remainder.
1, 2, 4, 8, 16, 41, 82, 164, 328, 656
Factors of 663
List of positive integer factors of 663 that divides 663 without a remainder.
1, 3, 13, 17, 39, 51, 221, 663
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 656 and 663, than apply into the LCM equation.
GCF(656,663) = 1
LCM(656,663) = ( 656 × 663) / 1
LCM(656,663) = 434928 / 1
LCM(656,663) = 434928
(i) The LCM of 663 and 656 is associative
LCM of 656 and 663 = LCM of 663 and 656
1. What is the LCM of 656 and 663?
Answer: LCM of 656 and 663 is 434928.
2. What are the Factors of 656?
Answer: Factors of 656 are 1, 2, 4, 8, 16, 41, 82, 164, 328, 656. There are 10 integers that are factors of 656. The greatest factor of 656 is 656.
3. What are the Factors of 663?
Answer: Factors of 663 are 1, 3, 13, 17, 39, 51, 221, 663. There are 8 integers that are factors of 663. The greatest factor of 663 is 663.
4. How to Find the LCM of 656 and 663?
Answer:
Least Common Multiple of 656 and 663 = 434928
Step 1: Find the prime factorization of 656
656 = 2 x 2 x 2 x 2 x 41
Step 2: Find the prime factorization of 663
663 = 3 x 13 x 17
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 434928 = 2 x 2 x 2 x 2 x 3 x 13 x 17 x 41
Step 4: Therefore, the least common multiple of 656 and 663 is 434928.