At this point in the season, Donovan has scored 26 * 15 = <<26*15=390>>390 points.
To reach his goal of 30 points per game, he would have to finish the season with a total of 30 * 20 = <<30*20=600>>600 points.
For the remaining 5 games, Donovan needs to score 600 - 390 = <<600-390=210>>210 points.
Therefore, he needs to average 210 / 5 = <<210/5=42>>42 points per game.
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