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  1. N,d=1500,lambda n:sum(i for i in range(1,n) if n%i==0)
  2. print({i:d(i) for i in range(N+1) if i==d(d(i)) and i>d(i)})
Success #stdin #stdout 0.14s 27712KB
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Standard input is empty
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{1210: 1184, 284: 220}
https://ideone.com/iHBVwE
language:
Python 3 (python  3.9.5)
created:
7 years ago
visibility:
secret

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