C#
#1 420
#2 272
#3 204
#4 146
#5 16
#6 15
#7 6
#8 5
#9 4
#10 3
#11 2
#12 2
#13 1
#14 1
#15 1
#16 1
#17 1
#18 1
#19 1
#20 1