you may use the exact part number and look at the manufacturer´s internet site or other internet sources like wikipedia.
(That´s how Id do it, because no OS or virtual machine will influence/pretend core count)
If you ant to find out at the PC (by software), then you should tell us your OS and whether you use virtual machines....
This download page contains two versions of Intel® Processor Identification Utility for Windows*. Version 7.1.8 supports 12th Gen and newer processors. While Legacy version 6.10.36.0129 (released 02/07/2024), supports 11th Gen and older processors. Please download the appropriate version for...