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A334117
Odd numbers with abundancy >= 3/2; that is, numbers m such that sigma(m) >= 3m/2.
3
15, 21, 45, 63, 75, 99, 105, 117, 135, 147, 153, 165, 171, 189, 195, 207, 225, 231, 255, 273, 285, 297, 315, 345, 351, 357, 375, 399, 405, 429, 435, 441, 459, 465, 483, 495, 513, 525, 555, 561, 567, 585, 609, 615, 621, 627, 645, 651, 663, 675, 693, 705, 735, 741, 759
OFFSET
1,1
COMMENTS
The density of this sequence exists and is positive. If m is in this sequence, then so is mk, where k is a positive odd number (see A334118).
LINKS
Charles R Greathouse IV, Table of n, a(n) for n = 1..10000
PROG
(PARI) is(n)=n%2 && sigma(n, -1)>=3/2
(PARI) forfactored(n=1, 10^4, if(sigma(n, -1)>=3/2 && n[1]%2, print1(n[1]", ")))
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved