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A066881
Numbers n such that sigma(phi(n))/sigma(n) is an integer >= 4.
+0
2
121679, 1043909, 2350171, 2918263, 3396103, 3566807, 3688067, 4019467, 4562827, 5963407, 7300697, 7485979, 7853933, 8103301, 8364151, 9237779, 9514213, 9638527, 10531123, 11094619, 11384447, 12721937, 13576267, 15331313
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Maintained by
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
AT&T Labs Research
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