reserve X for set;
reserve a,b,c,k,m,n for Nat;
reserve i,j for Integer;
reserve r for Real;
reserve p,p1,p2 for Prime;

theorem Th32:
  m * n = 82 implies m = 1 & n = 82
                  or m = 2 & n = 41
                  or m = 41 & n = 2
                  or m = 82 & n = 1
  proof
    assume
A1: m*n = 82;
    m divides m*n;
    then m = 1 or m = 2 or m = 41 or m = 82 by A1,Th18;
    hence thesis by A1;
  end;
