1,2

phi(n)=A000010(n) is the Euler totient function, while sigma(n)=A000203(n) is the sum of divisors of n

sigma(2250885)=168^3 and phi(2250885)=96^3.

Cf. A000010, A000203.

Sequence in context: A119740 A022246 A050257 this_sequence A023686 A156998 A156999

Adjacent sequences: A113936 A113937 A113938 this_sequence A113940 A113941 A113942

nonn

Giovanni Resta (g.resta(AT)iit.cnr.it), Jan 31 2006