In PowerShell, you will get all the alias and their commands using Alias: drive as shown below.
Here, Alias: is the drive but surprisingly you will not find it in your operating system. This is the virtual drive and there are other virtual drives as well. You can list all the virtual drives using the below command.
Get-Alias will provide the same result.
The above output provides the individual alias and their commands for it. But to group them based on their cmdlets, you need to use Group-Object command.
Dir Alias: | Group-Object Definition
You will see in the output that aliases are listed against their cmdlet and their counts as well.