How can I create a random list with numbers?

Just trying to create a group system using student id's as numbers from 1-200, I have been using this code:

import random
members = 5
participants=[1,2,3,4,5,6,7,8,9,10,11]
random.shuffle(participants)
for i in range(len(participants) // members + 1):
    print('Group {} consists of:'.format(i + 1))
    group = participants[i*members:i*members + members]
    for participant in group:
        print(participant)

This works really well however I was going to use the numbers like to add or multiply the number in the group but gives me an 'int' error? Can anyone help? Thank you very much!1