Kraftwerk were hugely influential on the pioneers of hip-hop. One clear example is Afrika Bambaataa sampling "Trans-Europe Express" for "Planet Rock," one of the earliest hip-hop records.
Numbers is my favourite Kraftwerk track. I think it's just perfect. I swear you could still play that out and it's as fresh as ever.
I don't know much about pop music but Coldplay were clearly influenced by Computer Love and Kyle Minougue has also borrowed heavily for "Can't Get You Out of My Head". I think both have spoken about Kraftwerk's influence.