Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 790 and 798 the smallest integer that is 315210 that is divisible by both numbers.
Least Common Multiple (LCM) of 790 and 798 is 315210.
LCM(790,798) = 315210
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 790 and 798. First we will calculate the prime factors of 790 and 798.
Prime Factorization of 790
2 | 790 |
5 | 395 |
79 | 79 |
1 |
Prime factors of 790 are 2, 5,79. Prime factorization of 790 in exponential form is:
790 = 21×51×791
Prime Factorization of 798
2 | 798 |
3 | 399 |
7 | 133 |
19 | 19 |
1 |
Prime factors of 798 are 2, 3, 7,19. Prime factorization of 798 in exponential form is:
798 = 21×31×71×191
Now multiplying the highest exponent prime factors to calculate the LCM of 790 and 798.
LCM(790,798) = 21×31×51×71×191×791
LCM(790,798) = 315210
Factors of 790
List of positive integer factors of 790 that divides 790 without a remainder.
1, 2, 5, 10, 79, 158, 395, 790
Factors of 798
List of positive integer factors of 798 that divides 798 without a remainder.
1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 114, 133, 266, 399, 798
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 790 and 798, than apply into the LCM equation.
GCF(790,798) = 2
LCM(790,798) = ( 790 × 798) / 2
LCM(790,798) = 630420 / 2
LCM(790,798) = 315210
(i) The LCM of 798 and 790 is associative
LCM of 790 and 798 = LCM of 798 and 790
1. What is the LCM of 790 and 798?
Answer: LCM of 790 and 798 is 315210.
2. What are the Factors of 790?
Answer: Factors of 790 are 1, 2, 5, 10, 79, 158, 395, 790. There are 8 integers that are factors of 790. The greatest factor of 790 is 790.
3. What are the Factors of 798?
Answer: Factors of 798 are 1, 2, 3, 6, 7, 14, 19, 21, 38, 42, 57, 114, 133, 266, 399, 798. There are 16 integers that are factors of 798. The greatest factor of 798 is 798.
4. How to Find the LCM of 790 and 798?
Answer:
Least Common Multiple of 790 and 798 = 315210
Step 1: Find the prime factorization of 790
790 = 2 x 5 x 79
Step 2: Find the prime factorization of 798
798 = 2 x 3 x 7 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 = 315210 = 2 x 3 x 5 x 7 x 19 x 79
Step 4: Therefore, the least common multiple of 790 and 798 is 315210.