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Cubed Integers Equal Digit Sums
The sum of the digits of 4913 is 17, and 17^3 = 4913. Can you find any other integers which exhibit this behaviour with cubes? And with 4th, 5th, 6th, & 7th powers? Limit your search to integers no greater than 1 billion (10^9). |
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Last Updated: February 28th, 2010.