Clusterize item set with items as vectors of features
1.you just have to represent those  features as numeric in a vector
eg:[2,4,8,10]
2.Its a good  practise to normalize vector i just took sum of elements and divide by each element by that sum of elements  =[0.06666666666666667,0.13333333333333333,0.2,0.26666666666666666,0.3333333333333333]
normalize the values in that vector to be between 0 -1
3.feed the vectors into clustering algorithm (you can try with kmeans)