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Solution - Least common multiple (LCM) by prime factorization

24,552
24,552

Step-by-step explanation

1. Find the prime factors of 24

Tree view of the prime factors of 24: 2, 2, 2 and 3

The prime factors of 24 are 2, 2, 2 and 3.

2. Find the prime factors of 36

Tree view of the prime factors of 36: 2, 2, 3 and 3

The prime factors of 36 are 2, 2, 3 and 3.

3. Find the prime factors of 44

Tree view of the prime factors of 44: 2, 2 and 11

The prime factors of 44 are 2, 2 and 11.

4. Find the prime factors of 62

Tree view of the prime factors of 62: 2 and 31

The prime factors of 62 are 2 and 31.

5. Build a prime factors table

Determine the maximum number of times each prime factor (2, 3, 11, 31) occurs in the factorization of the given numbers:

Prime factorNumber24 36 44 62 Max. occurrence
232213
312002
1100101
3100011

The prime factors 11 and 31 occur one time, while 2 and 3 occur more than once.

6. Calculate the LCM

The least common multiple is the product of all factors in the greatest number of their occurrence.

LCM = 222331131

LCM = 23321131

LCM = 24,552

The least common multiple of 24, 36, 44 and 62 is 24,552.

Why learn this

The least common multiple (LCM), sometimes called the lowest common multiple or least common divisor, is helpful for understanding the relationships between numbers. For example, if it takes Earth 365 days to orbit the sun and it takes Venus 225 days to orbit the sun and both are in perfect alignment at the time this scenario is given, how long will it take for Earth and Venus to align again? We can use LCM to determine that the answer would be 16,425 days.

LCM is also a very important part of many mathematical concepts that also have real-world applications. For example, we use LCMs when adding and subtracting fractions, which we use quite frequently.