As noted earlier, it depends on the EXACT pump model and configuration (not enough info provided). The internal volume of the pump head, the tubing, flow cell, injector, the column size/volume and all related parts must be taken into account to find out.
In general, many of those single pump head units which claim they can be used at a wide range of flow rates, example 0.100 to 100 ml, are just exaggerations. Even if they can operate at pressure and deliver the needed flow rates, most will not do so at a level which is usable for chromatography applications. By design, most pumps have a very limited usable range and anything outside that are generally not used (opinion: BEST to always buy dedicated pumps designed for a specific range. Those all-in-one analytical to semi-prep pumps are often a waste of money).