Electronic Proceedings of the Twentyfirst Annual International Conference on Technology in Collegiate MathematicsNew Orleans, Louisiana, March 1215, 2009Paper C002
This is an electronic reprint, reproduced by permission of Pearson Education Inc. Originally appeared in the Proceedings of the Twentyfirst Annual International Conference on Technology in Collegiate Mathematics, ISBN 0321689836, Copyright (C) 2010 by Pearson Education, Inc. 
Accessing Primes and Exponents from the TI89 Factor Command 
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The author presents a utility program that efficiently produces a list of the primes and exponents in the prime power factorization of a positive integer as well as applications of the program to produce the Euler phi function, the number of divisors function, and the sum of the divisors function.
Keyword(s): number theory, TI89