Numbers k for which the sums of prime factors (ignoring multiplicity) of sigma(k) and phi(k) are equal but the sets of prime factors of sigma and phi are different.

A081378

Numbers k for which the sums of prime factors (ignoring multiplicity) of sigma(k) and phi(k) are equal but the sets of prime factors of sigma and phi are different.

Terms

    a(0) =412a(1) =1142a(2) =1236a(3) =1328a(4) =1339a(5) =1703a(6) =2855a(7) =2875a(8) =2884a(9) =3406a(10) =3426a(11) =3668a(12) =3708a(13) =3984a(14) =4017a(15) =5109a(16) =5356a(17) =5710a(18) =5750a(19) =5924a(20) =6003a(21) =6281a(22) =6399a(23) =6413a(24) =6640a(25) =6812a(26) =7994a(27) =8054a(28) =8318a(29) =8515

External references