Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 756 and 764 the smallest integer that is 144396 that is divisible by both numbers.
Least Common Multiple (LCM) of 756 and 764 is 144396.
LCM(756,764) = 144396
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 756 and 764. First we will calculate the prime factors of 756 and 764.
Prime Factorization of 756
2 | 756 |
2 | 378 |
3 | 189 |
3 | 63 |
3 | 21 |
7 | 7 |
1 |
Prime factors of 756 are 2, 3,7. Prime factorization of 756 in exponential form is:
756 = 22×33×71
Prime Factorization of 764
2 | 764 |
2 | 382 |
191 | 191 |
1 |
Prime factors of 764 are 2,191. Prime factorization of 764 in exponential form is:
764 = 22×1911
Now multiplying the highest exponent prime factors to calculate the LCM of 756 and 764.
LCM(756,764) = 22×33×71×1911
LCM(756,764) = 144396
Factors of 756
List of positive integer factors of 756 that divides 756 without a remainder.
1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 42, 54, 63, 84, 108, 126, 189, 252, 378, 756
Factors of 764
List of positive integer factors of 764 that divides 764 without a remainder.
1, 2, 4, 191, 382, 764
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 756 and 764, than apply into the LCM equation.
GCF(756,764) = 4
LCM(756,764) = ( 756 × 764) / 4
LCM(756,764) = 577584 / 4
LCM(756,764) = 144396
(i) The LCM of 764 and 756 is associative
LCM of 756 and 764 = LCM of 764 and 756
1. What is the LCM of 756 and 764?
Answer: LCM of 756 and 764 is 144396.
2. What are the Factors of 756?
Answer: Factors of 756 are 1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 42, 54, 63, 84, 108, 126, 189, 252, 378, 756. There are 24 integers that are factors of 756. The greatest factor of 756 is 756.
3. What are the Factors of 764?
Answer: Factors of 764 are 1, 2, 4, 191, 382, 764. There are 6 integers that are factors of 764. The greatest factor of 764 is 764.
4. How to Find the LCM of 756 and 764?
Answer:
Least Common Multiple of 756 and 764 = 144396
Step 1: Find the prime factorization of 756
756 = 2 x 2 x 3 x 3 x 3 x 7
Step 2: Find the prime factorization of 764
764 = 2 x 2 x 191
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 144396 = 2 x 2 x 3 x 3 x 3 x 7 x 191
Step 4: Therefore, the least common multiple of 756 and 764 is 144396.