A049058 Second element s of (-1)sigma sociable triple (r,s,t): s=(-1)sigma(r), t=(-1)sigma(s), r=(-1)sigma(t), where if x=Product p(i)^r(i), then (-1)sigma(x)=Product(-1+(Sum p(i)^s(i), s(i)=1 to r(i))).

60, 120, 480, 1464, 7680, 24504, 490080

Offset: 0

Author

Yasutoshi Kohmoto

Keywords

• nonn

Comments

Definition unclear, see comments in A049057. - Sean A. Irvine, Jul 17 2021

Examples

			Factorizations 2^2*3*5, 2^3*3*5, 2^5*3*5, 2^3*3*61, 2^9*3*5, 2^3*3*1021, 2^5*3*5*1021
		

Crossrefs

Cf. A049057, A049059, A049060.