For clarification:
The launcher icon can have the following dimensions:
- 36x36, 48x48, 72x72, 96x96, 144x144 and (max) 192x192 px
- LDPI, MDPI, HDPI, XHDPI, XXHDPI and XXXHDPI
For the Play Store icon: 512x512 px
see also my posts in this thread:
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