$2^{15} = 32768$ であり, これの数字和 ( 各桁の和 ) は $3 + 2 + 7 + 6 + 8 = 26$ となる.
同様にして, $2^{1000}$ の数字和を求めよ.
Python
# n = 15
n = 1000
result = sum(map(int, str(2 ** n)))
print result
print result == 1366
結果
1366
True
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