Mean number of companions (of any stellar mass) per dwarf in the logarithmic stellar mass bin, normalized by the number of dwarfs in the same mass bin. Values represent the median between different realizations of the sample in each mass bin. The blue line represents results for the total drawn dwarf galaxy sample, and the dotted gray line represents the results obtained by excluding all sources below the 0.187 Jy km s⁻¹ threshold in the H I flux. Shaded regions represent 1σ errors.