Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 70 and 76 the smallest integer that is 2660 that is divisible by both numbers.
Least Common Multiple (LCM) of 70 and 76 is 2660.
LCM(70,76) = 2660
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 70 and 76. First we will calculate the prime factors of 70 and 76.
Prime Factorization of 70
2 | 70 |
5 | 35 |
7 | 7 |
1 |
Prime factors of 70 are 2, 5,7. Prime factorization of 70 in exponential form is:
70 = 21×51×71
Prime Factorization of 76
2 | 76 |
2 | 38 |
19 | 19 |
1 |
Prime factors of 76 are 2,19. Prime factorization of 76 in exponential form is:
76 = 22×191
Now multiplying the highest exponent prime factors to calculate the LCM of 70 and 76.
LCM(70,76) = 22×51×71×191
LCM(70,76) = 2660
Factors of 70
List of positive integer factors of 70 that divides 70 without a remainder.
1, 2, 5, 7, 10, 14, 35, 70
Factors of 76
List of positive integer factors of 76 that divides 76 without a remainder.
1, 2, 4, 19, 38, 76
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 70 and 76, than apply into the LCM equation.
GCF(70,76) = 2
LCM(70,76) = ( 70 × 76) / 2
LCM(70,76) = 5320 / 2
LCM(70,76) = 2660
(i) The LCM of 76 and 70 is associative
LCM of 70 and 76 = LCM of 76 and 70
1. What is the LCM of 70 and 76?
Answer: LCM of 70 and 76 is 2660.
2. What are the Factors of 70?
Answer: Factors of 70 are 1, 2, 5, 7, 10, 14, 35, 70. There are 8 integers that are factors of 70. The greatest factor of 70 is 70.
3. What are the Factors of 76?
Answer: Factors of 76 are 1, 2, 4, 19, 38, 76. There are 6 integers that are factors of 76. The greatest factor of 76 is 76.
4. How to Find the LCM of 70 and 76?
Answer:
Least Common Multiple of 70 and 76 = 2660
Step 1: Find the prime factorization of 70
70 = 2 x 5 x 7
Step 2: Find the prime factorization of 76
76 = 2 x 2 x 19
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 2660 = 2 x 2 x 5 x 7 x 19
Step 4: Therefore, the least common multiple of 70 and 76 is 2660.