%I #12 Feb 12 2022 14:17:56
%S 1,6,10,26,28,49,54,74,122,126,146,294,314,386,408,490,496,554,626,
%T 680,794,842,914,1082,1226,1232,1274,1322,1346,1466,1514,1560,1754,
%U 1768,1994,2186,2306,2402,2426,2474,2642,2646,2762,2906,3242,3314,3360,3506,3626,3672,3746,3808,3866,3986,4034
%N Numbers k for which A003958(sigma(k)) = A003958(k), where A003958 is multiplicative with a(p^e) = (p-1)^e and sigma is the sum of divisors function.
%C Numbers k for which A351442(k) = A003958(k), or equally, for which k = A351444(k) = A322582(k) + A351442(k).
%H <a href="/index/Si#SIGMAN">Index entries for sequences related to sigma(n)</a>
%o (PARI)
%o A003958(n) = { my(f = factor(n)); for(i=1, #f~, f[i, 1]--); factorback(f); };
%o isA351446(n) = (A003958(sigma(n))==A003958(n));
%Y Cf. A000203, A003958, A322582, A351442, A351447.
%Y Fixed points of A351444, positions of zeros in A351445.
%Y Subsequences: A000396, A351443 (odd terms), A351440, A336702 (numbers k for which A064989(sigma(k)) = A064989(k)).
%K nonn
%O 1,2
%A _Antti Karttunen_, Feb 12 2022