perplexus.info :: Just Math : Divisor Sum Digits

Divisor Sum Digits (Posted on 2013-10-11)

d(n) denotes the largest odd divisor of a positive integer n.

Determine the last three digits of:

            d(1) + d(2) + d(3) + ... + d(2⁹⁹)

Submitted by K Sengupta

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Solution: (Hide)

The required last three digits is 588.

For a detailed explanation, refer to the solution submitted by Daniel in this location.

Comments: ( You must be logged in to post comments.)

Subject Author Date

analytical solution Daniel 2013-10-12 08:20:26

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