Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
Free LCM Calculator determines the least common multiple (LCM) between 1220 and 1224 the smallest integer that is 373320 that is divisible by both numbers.
Least Common Multiple (LCM) of 1220 and 1224 is 373320.
LCM(1220,1224) = 373320
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 1220 and 1224. First we will calculate the prime factors of 1220 and 1224.
Prime Factorization of 1220
2 | 1220 |
2 | 610 |
5 | 305 |
61 | 61 |
1 |
Prime factors of 1220 are 2, 5,61. Prime factorization of 1220 in exponential form is:
1220 = 22×51×611
Prime Factorization of 1224
2 | 1224 |
2 | 612 |
2 | 306 |
3 | 153 |
3 | 51 |
17 | 17 |
1 |
Prime factors of 1224 are 2, 3,17. Prime factorization of 1224 in exponential form is:
1224 = 23×32×171
Now multiplying the highest exponent prime factors to calculate the LCM of 1220 and 1224.
LCM(1220,1224) = 23×32×51×171×611
LCM(1220,1224) = 373320
Factors of 1220
List of positive integer factors of 1220 that divides 1220 without a remainder.
1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220
Factors of 1224
List of positive integer factors of 1224 that divides 1224 without a remainder.
1, 2, 3, 4, 6, 8, 9, 12, 17, 18, 24, 34, 36, 51, 68, 72, 102, 136, 153, 204, 306, 408, 612, 1224
The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1220 and 1224, than apply into the LCM equation.
GCF(1220,1224) = 4
LCM(1220,1224) = ( 1220 × 1224) / 4
LCM(1220,1224) = 1493280 / 4
LCM(1220,1224) = 373320
(i) The LCM of 1224 and 1220 is associative
LCM of 1220 and 1224 = LCM of 1224 and 1220
1. What is the LCM of 1220 and 1224?
Answer: LCM of 1220 and 1224 is 373320.
2. What are the Factors of 1220?
Answer: Factors of 1220 are 1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220. There are 12 integers that are factors of 1220. The greatest factor of 1220 is 1220.
3. What are the Factors of 1224?
Answer: Factors of 1224 are 1, 2, 3, 4, 6, 8, 9, 12, 17, 18, 24, 34, 36, 51, 68, 72, 102, 136, 153, 204, 306, 408, 612, 1224. There are 24 integers that are factors of 1224. The greatest factor of 1224 is 1224.
4. How to Find the LCM of 1220 and 1224?
Answer:
Least Common Multiple of 1220 and 1224 = 373320
Step 1: Find the prime factorization of 1220
1220 = 2 x 2 x 5 x 61
Step 2: Find the prime factorization of 1224
1224 = 2 x 2 x 2 x 3 x 3 x 17
Step 3: Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the lcm:
LCM = 373320 = 2 x 2 x 2 x 3 x 3 x 5 x 17 x 61
Step 4: Therefore, the least common multiple of 1220 and 1224 is 373320.