291.
Factors refer to whole numbers, not decimals.
There are infinitely many terms between 13 and 251. And between any two of them there infinitely many terms. And between ...
The prime numbers between 230 and 260 are 233, 239, 241, 251, and 257.
233 239 241 251 257.
233 239 241 251 257.
All the prime numbers between 230 and 260 are; 233, 239, 241, 251, and 257.
502 can be divided by 251 (that equals 2). However, 2 and 251 are the only [integer] numbers which multiply to give 502. It is possible to divide 502 by fractions but not by any other whole numbers. Sorry.
The prime numbers between 250 and 300 are 251, 257, 263, 269, 271, 277, 281, 283, and 293.
The sum of the prime numbers between 21 and 50 is 23 + 29 + 31 + 37 + 41 + 43 + 47 = 251. Subtracting 200 from this gives 251 - 200 = 51.
71, the difference between the lowest and highest numbers.
The numbers are 125 and 126.
None. 251 is a prime number.