SQL Server 2016 licensing question

Hi,

I have one physical SQL Server running on ProLiant BL460c Gen9 hardware blade. This blade got 2 CPUs with 16 cores each.

The SQL Server running on this hardware only have 24 cores dedicated (since this seems to be the maximum number of cores Standard license can use).

I am having a hard time figuring out how this should be licensed. When I read about the Per Core licensing model it says that you should buy license for each physical core. 

But which of the numbers should I go for when buying the licenses, the maximum number of physical cores dedicated to the SQL Server (24 cores) or the maximum number of physical cores available on the hardware blade (32 cores).

Thanks!