Use a factor tree.
72
36,2
18,2,2
9,2,2,2
3,3,2,2,2
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The prime factorization for 72 is in the following 2.2.2.3.3=72
72 = 23 x 32
The prime factorization of 72 is: 2 × 2 × 2 × 3 × 3.
To find the Least Common Multiple (LCM) of 6, 8, and 18, you need to first find the prime factorization of each number. The prime factorization of 6 is 2 x 3, the prime factorization of 8 is 2 x 2 x 2, and the prime factorization of 18 is 2 x 3 x 3. Then, you take the highest power of each prime factor that appears in any of the numbers: 2^3 x 3^2 = 72. Therefore, the LCM of 6, 8, and 18 is 72.
49 = 72