A115619 Sigma(A033631(n)) {sigma is the sum of divisors function A000203}.

1, 120, 546, 1680, 2880, 7812, 14520, 34200, 40320, 40320, 53760, 68796, 63360, 76608, 78624, 80640, 89280, 86400, 95040, 90720, 129600, 178560, 155496, 205920, 214272, 190080, 223200, 245520, 241920, 244800, 267840, 280800, 259200, 312480, 345600, 313560, 393120, 374976, 401760, 367200, 464256

Offset: 1

Author

Lekraj Beedassy, Jan 26 2006

Keywords

• nonn

Links

• T. D. Noe, Table of n, a(n) for n = 1..1000

Programs

PARI

for(n=1,1e6,if(sigma(eulerphi(n))==sigma(n),print1(sigma(n)", "))) \\ Charles R Greathouse IV, Feb 19 2013