The prime factorization of 5 is 5 . Since it has only one prime factor, 5 is a prime number. Divisors of 5 1, 5 2 divisors Your guide to the number 5 , an odd number which is prime. Mathematical info, prime factorization, fun facts and numerical data for STEM, education and fun. Learn the different ways number 5 can be represented. See the number five on a number line, five frame, ten frame, numeral, word, dice, dominoes, tally mark, fingers and picture representations. 5 is a Fermat prime, a Mersenne prime exponent, [1] as well as a Fibonacci number. 5 is the first congruent number, as well as the length of the hypotenuse of the smallest integer-sided right triangle, making part of the smallest Pythagorean triple (3, 4, 5 ).
