240940299600
domain: N
Appears in sequences
- Numbers that set records for the number by which they must be multiplied to double the number of divisors.at n=18A138570
- a(n) is the smallest integer k such that n*k is the smallest multiple of k with twice as many divisors as k, or 0 if no such number is possible.at n=27A139315
- Largely composite numbers (A067128) with a unique number of divisors.at n=26A308531
- Largest highly composite number that has n prime factors counted with multiplicity.at n=16A328522
- Highly composite numbers (A002182) such that the exponents of 2 and 3 in their prime factorization are equal.at n=17A348568
- a(n) = denominator( (-1)^(n-1)*H(2*n)/(2*n + 1) ), where H(n) is the n-th harmonic number.at n=13A392690