A180463 a(n) is the smallest number m such that sigma(m)=38^n, or 0 if m does not exist.

1, 37, 0, 0, 0, 0, 0, 85811686941, 3175032416817, 159809964979789, 4561513295803851, 155532888827892597, 5754716886632026089, 249887680992407652771, 8319571903089894983277, 307824160414326114381249, 12077787753685017948512649, 455818072892233197941369463

Offset: 0

Author

Walter Kehowski, Sep 06 2010

Keywords

• nonn

Examples

			a(7)=85811686941=3*28603895647 since sigma(85811686941)= (2^2)*(2^5*19^7)=2^7*19^7 and 85811686941 is the smallest such number.
		

Links

• Max Alekseyev, Table of n, a(n) for n = 0..100

Crossrefs

Cf. A048251, A110077, A180265, A180460, A180461, A180462, A180464.

Extensions

Terms a(16) onward from Max Alekseyev, Mar 03 2014