The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A085379 Greatest prime as sum of distinct divisors of n. 3
 3, 3, 7, 5, 11, 7, 13, 13, 17, 11, 23, 13, 23, 23, 31, 17, 37, 19, 41, 31, 23, 23, 59, 31, 41, 37, 53, 29, 71, 31, 61, 47, 53, 47, 89, 37, 59, 53, 89, 41, 89, 43, 83, 73, 71, 47, 113, 7, 83, 71, 97, 53, 113, 71, 113, 79, 89, 59, 167, 61, 31, 103, 127, 83, 139, 67 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 COMMENTS a(n)<=A070801(n)<=A000203(n): a(A085380(n))=A070801(A085380(n)), a(A085381(n)) < A070801(A085381(n)); a(A023194(n))=A000203(A023194(n))=A062700(n). LINKS Eric Weisstein's World of Mathematics, Divisor Function EXAMPLE Divisors of n=50 are {1,2,5,10,25,50}, sums of distinct divisors that are prime: 2, 3=2+1, 5, 7=5+2, 11=10+1, 13=10+2+1, 17=10+5+2, 31=25+5+1, 37=25+10+2, 41=25+10+5+1, 43=25+10+5+2+1, 53=50+2+1, 61=50+10+1, 67=50+10+5+2 and 83=50+25+5+2+1: therefore a(50)=83<89=A070801(50), A085381(3)=50. CROSSREFS Sequence in context: A129527 A245550 A318461 * A070801 A114753 A079316 Adjacent sequences:  A085376 A085377 A085378 * A085380 A085381 A085382 KEYWORD nonn AUTHOR Reinhard Zumkeller, Jun 26 2003 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified July 25 03:53 EDT 2021. Contains 346283 sequences. (Running on oeis4.)