A274829 Numbers in the range of the sum of deficient divisors function.

1, 3, 4, 6, 7, 8, 10, 12, 13, 14, 15, 18, 19, 20, 22, 24, 27, 28, 30, 31, 32, 34, 36, 38, 40, 42, 43, 44, 46, 48, 52, 54, 56, 57, 60, 62, 63, 64, 66, 68, 70, 72, 74, 75, 76, 78, 80, 84, 86, 90, 92, 93, 94, 96, 97, 98, 102, 104, 105, 106, 108, 110, 112, 114, 118, 120, 121, 122, 123, 124, 126, 127, 128, 130, 132, 133, 134, 135, 138, 139, 140, 142, 144, 148, 150, 151, 152, 153, 154, 156, 158

Offset: 1

Author

Timothy L. Tiffin, Jul 07 2016

Keywords

• nonn

Comments

Possible values for the sum of deficient divisors of the positive integers, written in ascending order.

Crossrefs

Cf. A005100, A187793, A210510 (complement).

Programs

Mathematica

Take[#, 100] &@ Union@ Table[Total@ Select[Divisors@ n, DivisorSigma[1, #] < 2 # &], {n, 10^4}] (* Michael De Vlieger, Jul 13 2016 *)