Does Maple have a routine for -directly- calculating an integral over a region defined implicitly by an inequality. Suppose region R is defined by f(x,y)<c and we want to find  integral g(x,y) over R. Does Maple have a procedure for this? The required output will be a function of c.

ifactor(8650368) produces

                                                        2503  *  2^7 * 3^3

how can I produce the output with factors in order from small to large and printed f rom left

2^7 * 3^3 * 2503