OFFSET
1,2
COMMENTS
From Alonso del Arte, Oct 10 2017: (Start)
There are just three ways to partition 100 into its distinct divisors: 100 = 50 + 25 + 20 + 5 = 50 + 25 + 20 + 4 + 1 (see A033630).
However, it's not possible to exchange a United States 1-dollar coin for smaller coins of distinct denominations in current circulation since there are no 4- or 20-cent coins (see A112024).
Nor is it possible to exchange a 100-dollar bill for smaller bills of distinct denominations as there are no 4- or 25-dollar bills (see A124146). (End)
FORMULA
a(n) = 2^((n-1) mod 3)*5^floor((n-1)/3). - Aaron J Grech, Aug 11 2024
MATHEMATICA
Divisors[100] (* Vladimir Joseph Stephan Orlovsky, Feb 18 2012 *)
PROG
(Sage) divisors(100); # Zerinvary Lajos, Jun 13 2009
(PARI) divisors(100)
CROSSREFS
KEYWORD
nonn,fini,full,easy
AUTHOR
STATUS
approved