Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 778 and 786 the smallest integer that is 305754 that is divisible by both numbers.
Least Common Multiple (LCM) of 778 and 786 is 305754.
LCM(778,786) = 305754
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 778 and 786. First we will calculate the prime factors of 778 and 786.
Prime Factorization of 778
2 | 778 |
389 | 389 |
1 |
Prime factors of 778 are 2,389. Prime factorization of 778 in exponential form is:
778 = 21×3891
Prime Factorization of 786
2 | 786 |
3 | 393 |
131 | 131 |
1 |
Prime factors of 786 are 2, 3,131. Prime factorization of 786 in exponential form is:
786 = 21×31×1311
Now multiplying the highest exponent prime factors to calculate the LCM of 778 and 786.
LCM(778,786) = 21×31×1311×3891
LCM(778,786) = 305754
Factors of 778
List of positive integer factors of 778 that divides 778 without a remainder.
1, 2, 389, 778
Factors of 786
List of positive integer factors of 786 that divides 786 without a remainder.
1, 2, 3, 6, 131, 262, 393, 786
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 778 and 786, than apply into the LCM equation.
GCF(778,786) = 2
LCM(778,786) = ( 778 × 786) / 2
LCM(778,786) = 611508 / 2
LCM(778,786) = 305754
(i) The LCM of 786 and 778 is associative
LCM of 778 and 786 = LCM of 786 and 778
1. What is the LCM of 778 and 786?
Answer: LCM of 778 and 786 is 305754.
2. What are the Factors of 778?
Answer: Factors of 778 are 1, 2, 389, 778. There are 4 integers that are factors of 778. The greatest factor of 778 is 778.
3. What are the Factors of 786?
Answer: Factors of 786 are 1, 2, 3, 6, 131, 262, 393, 786. There are 8 integers that are factors of 786. The greatest factor of 786 is 786.
4. How to Find the LCM of 778 and 786?
Answer:
Least Common Multiple of 778 and 786 = 305754
Step 1: Find the prime factorization of 778
778 = 2 x 389
Step 2: Find the prime factorization of 786
786 = 2 x 3 x 131
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 305754 = 2 x 3 x 131 x 389
Step 4: Therefore, the least common multiple of 778 and 786 is 305754.