public static void main ( String args [ ] ) {
  Scanner sc = new Scanner ( System . in ) ;
  int a = sc . nextInt ( ) ;
  int b = sc . nextInt ( ) ;
  int count = 0 ;
  int end = a - b ;
  if ( a == b ) {
    System . out . println ( "infinity" ) ;
    return ;
  }
  for ( int i = 1 ;
  i <= Math . sqrt ( end ) ;
  i ++ ) {
    if ( a % i == b ) count ++ ;
    if ( ( end % i ) == 0 ) {
      if ( i > end ) count ++ ;
      if ( ( end / i ) != i && ( end / i ) > b ) count ++ ;
    }
  }
  System . out . println ( Integer . toString ( count ) ) ;
}

public static void main ( String args [ ] ) { Scanner sc = new Scanner ( System . in ) ; int a = sc . nextInt ( ) ; int b = sc . nextInt ( ) ; int count = 0 ; int end = a - b ; if ( a == b ) { System . out . println ( " infinity " ) ; return ; } for ( int i = 1 ; i <= Math . sqrt ( end ) ; i ++ ) { if ( a % i == b ) count ++ ; if ( ( end % i ) == 0 ) { if ( i > end ) count ++ ; if ( ( end / i ) != i && ( end / i ) > b ) count ++ ; } } System . out . println ( Integer . toString ( count ) ) ; }
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