OFFSET
1,1
LINKS
Erich Friedman, Problem of the month August 2003
EXAMPLE
135 = 1 * 3^3 * 5
1715 = 1 * 7^3 * 1 * 5
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Kausthub Gudipati, Sep 22 2011
STATUS
approved