public static long productPrimeFactors ( int n ) {
  long product = 1 ;
  if ( n % 2 == 0 ) {
    product *= 2 ;
    while ( n % 2 == 0 ) n = n / 2 ;
  }
  for ( int i = 3 ;
  i <= Math . sqrt ( n ) ;
  i = i + 2 ) {
    if ( n % i == 0 ) {
      product = product * i ;
      while ( n % i == 0 ) n = n / i ;
    }
  }
  if ( n > 2 ) product = product * n ;
  return product ;
}

public static long productPrimeFactors ( int n ) { long product = 1 ; if ( n % 2 == 0 ) { product *= 2 ; while ( n % 2 == 0 ) n = n / 2 ; } for ( int i = 3 ; i <= Math . sqrt ( n ) ; i = i + 2 ) { if ( n % i == 0 ) { product = product * i ; while ( n % i == 0 ) n = n / i ; } } if ( n > 2 ) product = product * n ; return product ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))) (while_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))) body: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) update: (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (identifier)))) (while_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (decimal_integer_literal))) body: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (identifier))))))))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) consequence: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (identifier))))) (return_statement (identifier))))