Get data
x = Import["C:\\Book1.xlsx", {"Sheets", "Sheet1"}]
Recover the integers for instance like this
y = Floor /@ x[[1]] // Flatten
(* Out[202]= {Floor["Student ID"], 2014512060, 2013512024, 2013512028} *)
Just the data are then
z = Drop[y,1]
(* Out[203]= {2014512060, 2013512024, 2013512028} *)