-
Superperfect may
refer to:
Superperfect group Superperfect number This
disambiguation page
lists articles ****ociated with the
title Superperfect. If an...
- In
number theory, a
superperfect number is a
positive integer n that
satisfies σ 2 ( n ) = σ ( σ ( n ) ) = 2 n , {\displaystyle \sigma ^{2}(n)=\sigma (\sigma...
- In mathematics, in the
realm of
group theory, a
group is said to be
superperfect when its
first two
homology groups are trivial: H1(G, Z) = H2(G, Z) =...
- not
adjacent to
either a
Mersenne prime or a
Fermat prime, the
fourth superperfect number — a
number such that σ(σ(n)) = 2n, the sum of Euler's totient...
- [ 5 ] 3 {\displaystyle 2[5]3} (hyperoperation notation). 65536 is a
superperfect number – a
number such that σ(σ(n)) = 2n. A 16-bit
number can distinguish...
- ways to play tic tac toe 262,144 = 218;
exponential factorial of 4; a
superperfect number 262,468 =
Leyland number 268,705 =
Leyland number 271,129 – smallest...
- List of
Mersenne primes and
perfect numbers Multiply perfect number Superperfect numbers Unitary perfect number Harmonic divisor number All
factors of...
- 642 = 163 = 84 = 46 = 212,
smallest number with
exactly 13 factors, a
superperfect number 4104 = 23 + 163 = 93 + 153 4127 – safe
prime 4133 – super-prime...
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Almost perfect Quasiperfect Multiply perfect Hemiperfect Hyperperfect Superperfect Unitary perfect Semiperfect Practical Descartes Erdős–Nicolas With many...
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converse is not true: A5 is
perfect but not
acyclic (in fact, not even
superperfect), see (Berrick &
Hillman 2003). In fact, for n ≥ 5 {\displaystyle n\geq...
