Yes, 19 x 2.
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38 is a composite number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.
38 is a composite number because composite numbers are numbers that have more than 1 and themselves as factors. 1x38 is not the only solution, so it isn't prime. One solution for this could be 2x19
yes
The number 38 can be obtained through multiplication by various combinations of factors. For example, 2 multiplied by 19 equals 38, as does 1 multiplied by 38. In mathematical terms, 38 is a composite number that can be expressed as the product of its prime factors, which are 2 and 19.
31,37 are not composite