In order to export a DXF/DWG file with the 1:1 scale, this option will have to be enabled within the export options. To get to the export options, go to File->Save As and change the file type to DXF/DWG. Then click on the Options button.
Under the "Scale output 1:1" section, check the box to enable it and make sure the "Base scale" is correct as well. The sheet scale is the scale of the drawing sheet whereas the view scale is the scale of one of the drawing views. The count is how many drawing views are using that particular scale.