Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 64 and 77 the smallest integer that is 4928 that is divisible by both numbers.
Least Common Multiple (LCM) of 64 and 77 is 4928.
LCM(64,77) = 4928
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 64 and 77. First we will calculate the prime factors of 64 and 77.
Prime Factorization of 64
2 | 64 |
2 | 32 |
2 | 16 |
2 | 8 |
2 | 4 |
2 | 2 |
1 |
Prime factors of 64 are 2. Prime factorization of 64 in exponential form is:
64 = 26
Prime Factorization of 77
7 | 77 |
11 | 11 |
1 |
Prime factors of 77 are 7,11. Prime factorization of 77 in exponential form is:
77 = 71×111
Now multiplying the highest exponent prime factors to calculate the LCM of 64 and 77.
LCM(64,77) = 26×71×111
LCM(64,77) = 4928
Factors of 64
List of positive integer factors of 64 that divides 64 without a remainder.
1, 2, 4, 8, 16, 32, 64
Factors of 77
List of positive integer factors of 77 that divides 77 without a remainder.
1, 7, 11, 77
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 64 and 77, than apply into the LCM equation.
GCF(64,77) = 1
LCM(64,77) = ( 64 × 77) / 1
LCM(64,77) = 4928 / 1
LCM(64,77) = 4928
(i) The LCM of 77 and 64 is associative
LCM of 64 and 77 = LCM of 77 and 64
1. What is the LCM of 64 and 77?
Answer: LCM of 64 and 77 is 4928.
2. What are the Factors of 64?
Answer: Factors of 64 are 1, 2, 4, 8, 16, 32, 64. There are 7 integers that are factors of 64. The greatest factor of 64 is 64.
3. What are the Factors of 77?
Answer: Factors of 77 are 1, 7, 11, 77. There are 4 integers that are factors of 77. The greatest factor of 77 is 77.
4. How to Find the LCM of 64 and 77?
Answer:
Least Common Multiple of 64 and 77 = 4928
Step 1: Find the prime factorization of 64
64 = 2 x 2 x 2 x 2 x 2 x 2
Step 2: Find the prime factorization of 77
77 = 7 x 11
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 4928 = 2 x 2 x 2 x 2 x 2 x 2 x 7 x 11
Step 4: Therefore, the least common multiple of 64 and 77 is 4928.