A positive number is a number that is greater than zero. An integer is a whole number. That is, any number that does not have a decimal part. 3, 7 and 28 are integers. 38.4, 10.4 and 3/4 are not. A factor of a number is any number into which the original number can divide evenly. For example, 2 and 3 are both factors of 6.
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The positive integer with only one factor is 1.
10 of them.
A prime number is a number with two positive integer factors, while a composite number has more than two positive integer factors. Since the number 0 has no positive integer factors, and the number 1 has just one positive integer factor (itself), neither of these are prime.
The product would be a positive integer.
A prime number has two positive integer factors, itself and 1. The number 0 has no positive integer factors, and is therefore not prime. The number 1 has just a single positive integer factor, and once again, is not prime.