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A180463 a(n) is the smallest number m such that sigma(m)=38^n, or 0 if m does not exist. 6
1, 37, 0, 0, 0, 0, 0, 85811686941, 3175032416817, 159809964979789, 4561513295803851, 155532888827892597, 5754716886632026089, 249887680992407652771, 8319571903089894983277, 307824160414326114381249, 12077787753685017948512649, 455818072892233197941369463 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
EXAMPLE
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.
CROSSREFS
Sequence in context: A307949 A058432 A058458 * A190301 A077575 A215258
KEYWORD
nonn
AUTHOR
Walter Kehowski, Sep 06 2010
EXTENSIONS
Terms a(16) onward from Max Alekseyev, Mar 03 2014
STATUS
approved

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Last modified July 19 19:50 EDT 2024. Contains 374436 sequences. (Running on oeis4.)