<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>

<script type="text/javascript">

      google.charts.load('current', {'packages':['bar']});
      google.charts.setOnLoadCallback(drawChart);
      function drawChart() {
        var data = google.visualization.arrayToDataTable([
        //titulos de lose
        ['Tipo', 'asdass' ,],

         <?php
while ($row2 =mysqli_fetch_array($results2))
{
echo "['".$row2["id_usuario"]."', ".$row2["number2"]."],    ";
}
?>
        ]);

        var options = {
        chart: {
        //   title: 'Solicitudes por departamento',
        //     subtitle: 'Qu',
        // colors: ['#2ECC71', '#F4D03F', '#C0392B', '#2980B9', '#DAF7A6','#FFC300','#892ECC']
          }
        };
        var chart = new google.charts.Bar(document.getElementById('columnchart_material'));
        chart.draw(data, google.charts.Bar.convertOptions(options));
      }
    </script>




<div class="divuno" id="columnchart_material" style="width: 400px; height: 300px;"></div>