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A098204
Greatest common divisor of multiperfect numbers and their totient.
3
1, 2, 4, 8, 16, 96, 64, 864, 72, 1536, 252, 69120, 4096, 86400, 4608, 256, 768, 24576, 65536, 570240, 217728, 691200, 81920, 1105920, 262144, 245760, 516096, 9676800, 26544672, 50181120, 1741824, 2145024, 226437120, 103028889600, 12597120
OFFSET
1,2
LINKS
FORMULA
a(n) = gcd( A007691(n), A000010(A007691(n)) ).
a(n) = A009195(A007691(n)). - Amiram Eldar, May 10 2024
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Sep 23 2004
EXTENSIONS
More terms from Michel Marcus, Sep 19 2013
STATUS
approved