Well you have to put it in perspective. The earth has a magnetic field of 0.3 - 0.5 gauss. That puts this star at 143,000x as strong. Then you compare to the sun, which is 1 gauss, so this star is 43,000x as strong.
Okay, you might say, that's a lot, but this star is also 4x as massive as the sun. What about other stars bigger than the sun?
Beltugese is 16.5 - 19x the mass of the sun, and it's magnetic field has been carefully studied and measured to be about 1 gauss.
So yes, for a main sequence star this beast is a huge outlier.