The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A277553 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A277553

Numbers n such that the sum of the divisors of n is divisible by the number of divisors of n, and the sum of the squares of the divisors of n is divisible by the sum of the divisors of n.
(history; published version)

#21 by Peter Luschny at Fri Oct 21 03:58:20 EDT 2016

STATUS

proposed

approved

#20 by Michel Marcus at Fri Oct 21 03:32:20 EDT 2016

STATUS

editing

proposed

#19 by Michel Marcus at Fri Oct 21 03:32:04 EDT 2016

CROSSREFS

Intersection of A003601 and A020487. See also A020486.

STATUS

proposed

editing

Discussion

Fri Oct 21

03:32

Michel Marcus: ok like this ?

#18 by Vaclav Kotesovec at Fri Oct 21 02:46:16 EDT 2016

STATUS

editing

proposed

Discussion

Fri Oct 21

02:50

Michel Marcus: Yes. We could also add A020486, right ? Because  if A000005(n) divides A000203(n), and A000203(n) divides A001157(n), then  A000005(n) divides A001157(n)

02:57

Vaclav Kotesovec: OK

#17 by Vaclav Kotesovec at Fri Oct 21 02:45:56 EDT 2016

CROSSREFS

Intersection of A003601 and A02048A020487.

STATUS

approved

editing

Discussion

Fri Oct 21

02:46

Vaclav Kotesovec: Corrected.

#16 by N. J. A. Sloane at Thu Oct 20 16:13:42 EDT 2016

STATUS

editing

approved

#15 by N. J. A. Sloane at Thu Oct 20 16:13:38 EDT 2016

CROSSREFS

Intersection of A003601 and A02048.

STATUS

proposed

editing

#14 by Omar E. Pol at Wed Oct 19 15:59:01 EDT 2016

STATUS

editing

proposed

Discussion

Thu Oct 20

04:02

Ilya Gutkovskiy: Intersection of A003601 and A020487.

#13 by Omar E. Pol at Wed Oct 19 15:58:57 EDT 2016

NAME

Numbers n such that the sum of the divisors of n is divisible by the number of divisors of n, and the sum of the squares of the divisors of n is divisible by the sum of the divisors of n.

STATUS

proposed

editing

#12 by Omar E. Pol at Wed Oct 19 15:58:16 EDT 2016

STATUS

editing

proposed