Sigma-powerful numbers

Sigma-powerful numbers are powerful numbers n such that sigma(n), the sum of all divisors of n, is also powerful.A sigma-powerful number is indecomposable or if it is not the product of two sigma-powerful numbers, otherwise decomposable. One might also call them irreducble, primitive, etc. Here is a file of  all indecomposable sigma-powerful numbers to date (8/9/10):

sigma-powerful-indecomp.txt