No number under 100 has 13 factors. 60, 72, 84, 90, and 96 each have 12 factors.
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91 is not a prime number. 91 is a composite number having the factors 1, 7, 13, and 91.
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The factors of 9 are 1, 3, and 9. 1 + 3 + 9 = 13
There are five numbers in that range with 12 factors, but none with exactly eleven.
13 is prime and the factors of 13 are 1 and 13