perplexus.info :: Numbers : Neighbors

Neighbors (Posted on 2014-04-18)

Find the smallest integer n such that both n-1 and n+1 have the same number of divisors as n.
Bonus task: List few additional numbers with said feature.

Submitted by Ady TZIDON

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Solution: (Hide)

34 is the smallest integer as requested .
Bonus List - c. Charlie's post.

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

Subject	Author	Date
re(3): computer solution	Jer	2014-04-18 23:09:25
re(2): computer solution	Charlie	2014-04-18 22:14:13
re: computer solution	Jer	2014-04-18 14:08:50
re: a bit of cheating (spoiler)	Ady TZIDON	2014-04-18 13:38:14
computer solution	Charlie	2014-04-18 13:02:09
a bit of cheating (spoiler)	Jer	2014-04-18 12:58:37
four more	xdog	2014-04-18 10:40:21
solution	xdog	2014-04-18 10:29:22

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