Venus, Earth, Mars
Venus is 92 Bars of 96.5% CO2 i.e.
Earth has 380 ppm within 1 bar of total atmosphere = 0.38 millibars
Mars has 6.7 millibars of essentially pure CO2
So, Venus has 234,000 times as much CO2 in *pressure* terms, but we must adjust for gravity, so it's actually 264,000 times as much as Earth in molecular measure.
Mars has 16.8 times as much in pressure terms and 44.2 times as much in molecular measure.
Looks like your source slipped a few decimal places....