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 492 the smallest integer that is 120540 that is divisible by both numbers.
Least Common Multiple (LCM) of 490 and 492 is 120540.
LCM(490,492) = 120540
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 492. First we will calculate the prime factors of 490 and 492.
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 492
2 | 492 |
2 | 246 |
3 | 123 |
41 | 41 |
1 |
Prime factors of 492 are 2, 3,41. Prime factorization of 492 in exponential form is:
492 = 22×31×411
Now multiplying the highest exponent prime factors to calculate the LCM of 490 and 492.
LCM(490,492) = 22×31×51×72×411
LCM(490,492) = 120540
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 492
List of positive integer factors of 492 that divides 492 without a remainder.
1, 2, 3, 4, 6, 12, 41, 82, 123, 164, 246, 492
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 490 and 492, than apply into the LCM equation.
GCF(490,492) = 2
LCM(490,492) = ( 490 × 492) / 2
LCM(490,492) = 241080 / 2
LCM(490,492) = 120540
(i) The LCM of 492 and 490 is associative
LCM of 490 and 492 = LCM of 492 and 490
1. What is the LCM of 490 and 492?
Answer: LCM of 490 and 492 is 120540.
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 492?
Answer: Factors of 492 are 1, 2, 3, 4, 6, 12, 41, 82, 123, 164, 246, 492. There are 12 integers that are factors of 492. The greatest factor of 492 is 492.
4. How to Find the LCM of 490 and 492?
Answer:
Least Common Multiple of 490 and 492 = 120540
Step 1: Find the prime factorization of 490
490 = 2 x 5 x 7 x 7
Step 2: Find the prime factorization of 492
492 = 2 x 2 x 3 x 41
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 120540 = 2 x 2 x 3 x 5 x 7 x 7 x 41
Step 4: Therefore, the least common multiple of 490 and 492 is 120540.