Number ratio of surrounding satellites around AGN sample and its control star-forming sample. Left panel: ratio of the mean satellite number around two cAGN samples (cAGN and cAGN_σ*) over the mean satellite number around two corresponding control star-forming samples (cSF^c and cSF) as a function of satellite stellar mass, respectively. Right panel: same as the left, but the ratio is as function of satellite stellar mass (M_s) over central stellar mass (M_c).