3-admirable numbers: 3-abundant numbers (A068403) k such that exists a proper divisor d of k such that sigma(k) - 2*d = 3*k, where sigma(k) is the sum of divisors of k (A000203).
A329189
3-admirable numbers: 3-abundant numbers (A068403) k such that exists a proper divisor d of k such that sigma(k) - 2*d = 3*k, where sigma(k) is the sum of divisors of k (A000203).
Terms
- a(0) =180a(1) =240a(2) =360a(3) =420a(4) =504a(5) =540a(6) =600a(7) =780a(8) =1080a(9) =1344a(10) =1872a(11) =1890a(12) =2016a(13) =2184a(14) =2352a(15) =2376a(16) =2688a(17) =3192a(18) =3276a(19) =3744a(20) =4284a(21) =4320a(22) =4680a(23) =5292a(24) =5376a(25) =5796a(26) =6048a(27) =6552a(28) =7128a(29) =7344
External references
- oeis: A329189