Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 490 and 494 the smallest integer that is 121030 that is divisible by both numbers.
Least Common Multiple (LCM) of 490 and 494 is 121030.
LCM(490,494) = 121030
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 490 and 494. First we will calculate the prime factors of 490 and 494.
Prime Factorization of 490
2 | 490 |
5 | 245 |
7 | 49 |
7 | 7 |
1 |
Prime factors of 490 are 2, 5,7. Prime factorization of 490 in exponential form is:
490 = 21×51×72
Prime Factorization of 494
2 | 494 |
13 | 247 |
19 | 19 |
1 |
Prime factors of 494 are 2, 13,19. Prime factorization of 494 in exponential form is:
494 = 21×131×191
Now multiplying the highest exponent prime factors to calculate the LCM of 490 and 494.
LCM(490,494) = 21×51×72×131×191
LCM(490,494) = 121030
Factors of 490
List of positive integer factors of 490 that divides 490 without a remainder.
1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490
Factors of 494
List of positive integer factors of 494 that divides 494 without a remainder.
1, 2, 13, 19, 26, 38, 247, 494
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 490 and 494, than apply into the LCM equation.
GCF(490,494) = 2
LCM(490,494) = ( 490 × 494) / 2
LCM(490,494) = 242060 / 2
LCM(490,494) = 121030
(i) The LCM of 494 and 490 is associative
LCM of 490 and 494 = LCM of 494 and 490
1. What is the LCM of 490 and 494?
Answer: LCM of 490 and 494 is 121030.
2. What are the Factors of 490?
Answer: Factors of 490 are 1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490. There are 12 integers that are factors of 490. The greatest factor of 490 is 490.
3. What are the Factors of 494?
Answer: Factors of 494 are 1, 2, 13, 19, 26, 38, 247, 494. There are 8 integers that are factors of 494. The greatest factor of 494 is 494.
4. How to Find the LCM of 490 and 494?
Answer:
Least Common Multiple of 490 and 494 = 121030
Step 1: Find the prime factorization of 490
490 = 2 x 5 x 7 x 7
Step 2: Find the prime factorization of 494
494 = 2 x 13 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 = 121030 = 2 x 5 x 7 x 7 x 13 x 19
Step 4: Therefore, the least common multiple of 490 and 494 is 121030.