Dell Inspiron 3650 Overheating Can I replace fan?

My Inspiron 3650 i7 PC is constantly shooting over 70 degrees celsius with just moderate usage for 60-70% CPU. Sometimes it goes towards 80 degrees. I feel like it shouldn't be going into the 70s that easily.. Are there any alternative CPU heatsinks and fans that is compatible with this PC? Or are there other solutions?