Ascending order of results in sparql by using nonnegative integers that come as strings

I have more than 2000 resources in my triple store (GraphDB) that I would like to sort in ascending order, based on their IRI, whereas the IRI looks like:

http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#1 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#2 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#3 . http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#2345

In my graph, all abovementioned IRIs are connected to one resource by "DE6:complex_Data_Type_has_Member". In order to get all the abovementioned IRIs I do the following:

PREFIX DE6: PREFIX owl: PREFIX xsd: SELECT ?IRIs_to_Sort WHERE < ?Array a DE6:Data_Element; DE6:complex_Data_Type_has_Member ?IRIs_to_Sort . >ORDER BY ?IRIs_to_Sort

If I just use the "ORDER BY ?IRIs_to_Sort" solution sequence modifier, where as shown in https://www.w3.org/TR/2013/REC-sparql11-query-20130321/#modOrderBy then I get the following result (only first ten reults are shown):

http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#1 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#10 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#100 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#1000 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#1001 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#1002 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#1003 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#1004 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#1005 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#1006 . http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#1999 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#2 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#20 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#200 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#2000 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#2001 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#2002 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#2003 .

Instead, I would expect something like:

http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#1 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#2 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#3 http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#4 . http://TABLE/240b9f63-66b9-47f1-9e02-bfd03794bbd9#2099