highly composite numbers

E355438

Highly composite numbers are positive integers that have more divisors than any smaller positive integer, extensively studied and characterized by Srinivasa Ramanujan.

All labels observed (2)

Label Occurrences
Highly Composite Numbers 1
highly composite numbers canonical 1

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Statements (54)

Predicate Object
instanceOf integer sequence
mathematical concept
alternativeName anti-prime
application used in design of measurement systems with many divisors
used in problems involving highly divisible numbers
used in scheduling and partitioning problems
classification subset of positive integers
definition positive integer that has more divisors than any smaller positive integer
eighthTerm 48
field number theory
fifthTerm 12
firstTerm 1
fourthTerm 6
growthProperty terms grow faster than linearly
hasDivisorsCount 1 has 1 divisor
12 has 6 divisors
120 has 16 divisors
2 has 2 divisors
24 has 8 divisors
36 has 9 divisors
4 has 3 divisors
48 has 10 divisors
6 has 4 divisors
60 has 12 divisors
hasOpenProblems asymptotic behavior of counting function
distribution of highly composite numbers
introducedBy Srinivasa Ramanujan
ninthTerm 60
OEISSequence A002182
property all highly composite numbers are composite except 1
defined using the divisor function d(n)
each term has a record number of divisors
prime exponents in factorization form a non-increasing sequence
prime factorization uses small primes with non-increasing exponents
related to divisor-maximizing problems
sequence is strictly increasing
tend to be very dense in divisors
publication highly composite numbers self-linksurface differs
surface form: Highly Composite Numbers
publicationAuthor Srinivasa Ramanujan
publicationYear 1915
relatedTo Srinivasa Ramanujan
surface form: Ramanujan

abundant numbers
colossally abundant numbers
divisor function
highly composite k-tuples
superabundant numbers
secondTerm 2
seventhTerm 36
sixthTerm 24
studiedBy Srinivasa Ramanujan
symbolicDescription n is highly composite if d(n) > d(k) for all positive integers k < n
tenthTerm 120
thirdTerm 4
yearCharacterized 1915

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Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Srinivasa Ramanujan notableWork highly composite numbers
highly composite numbers publication highly composite numbers self-linksurface differs
subject surface form: highly composite number
this entity surface form: Highly Composite Numbers