Int dependency on another int in the details panel inside blueprint

Write a setter function for each of the variables to set the other two.

I think something like this would work (though I wonder if you meant to have the value of Three to depend on One and Two, not One and Three):

UPROPERTY(BlueprintSetter = SetTwo)
int Two;

UFUNCTION(BlueprintSetter)
void SetTwo(int Value) 
{ 
  Two = Value; 
  Three = One / Three; 
}