var readable = process.stdin;
readable.resume();
readable.setEncoding( 'utf-8' );
readable.on( 'data', function( chunk ) {
  var data = chunk.replace( '\n', '' ).split( ' ' ).map( Number );
  var cnt = 0;
  for( var i=data[0]; i<=data[1]; i++ ) {
    if( 0 == data[2]%i ) cnt++;
  }
  console.log( cnt  );
});