Project Euler #56: Powerful digit sum

Hacker
Rank
Score
4221
flag of Canada
25.00
4222
flag of India
25.00
4223
flag of India
25.00
4227
flag of India
25.00
4228
flag of India
25.00
4230
flag of India
25.00
4231
flag of United States
25.00
4235
flag of India
25.00
4236
flag of India
25.00
4238
flag of India
25.00
4240
flag of India
25.00
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