Question: 26 is not a prime number?
Answer: For 26, the answer is: No, 26 is not a prime number. The list of all positive divisors (i.e., the list of all integers that divide 26) is as follows: 1, 2, 13, 26. For 26 to be a prime number, it would have been required that 26 has only two divisors, i.e., itself and 1.