Mac fan speeds really high

I am using istats to see the speed of my fans:

I ran a diagnostic by holding down d during a restart and it came up without any errors. I've also reset pram and the readings are still really high. Is there a hardware error? What do I do to get correct readings again? I am on a 2018 15 inch i7 macbook pro and I'm quite concerned because all I have are a few chrome windows, spotify, and a terminal open. Having a CPU temperature of 43 degrees seems absurd.

EDIT: The widget Fanny also displays these speeds https://www.fannywidget.com/

There’s a lot to answer but here are my thinking:

1. Power off your Mac and reset the SMC one time - those blower speeds are non-sensical and look like an integer overflow.
2. Run software updates - apply EVERYTHING and consider downloading the OS installer and running it from Recovery HD - install right over your system as that won’t erase any accounts or settings and it will download EFI / firmware updates as needed - especially if you’re connected to a viable network when you reinstall.
3. A temperature of 100 C isn’t ridiculous - modern CPU run at the boiling point perfectly fine for extended periods - 43 C is a cool fall evening with a fresh breeze and nothing to worry about at all.
4. Don’t put much stock (if any) in the diagnostics - that’s designed to detect major component failures - not any sort of battery or fine grained test in my experience. Even the tests Apple runs at the Genius Bar while you wait are pretty trivial, basic tests.
5. Only 3 cycles on a battery makes me think you have a new Mac - be sure you contact iStat menus to be 100 % sure the software fully supports your specific model. I have seen new machines report nonsense until the vendor updates their software for new hardware and new sensors.

You should load the app Macs Fan Control from here. This app will tell you the temperature of key parts of your mac and also allow you to control your fan speed.