iterated sum of divisors function
Since itself is included in the set of its divisors, the sequence generated by repeated iterations is an increasing sequence (that is, in ascending order). For example, iterating the sum of divisors function for gives the sequence 2, 3, 4, 7, 8, 15, etc. Erdős conjectured that there is a limit for as approaches infinity.
- 1 R. K. Guy, Unsolved Problems in Number Theory New York: Springer-Verlag 2004: B9
|Title||iterated sum of divisors function|
|Date of creation||2013-03-22 17:03:36|
|Last modified on||2013-03-22 17:03:36|
|Last modified by||PrimeFan (13766)|