2901600

Appears in sequences

• a(n) = ((2^b-1)/phi(n))*Sum_{d|n} Moebius(n/d)*d^(b-1) for b = 5.at n=29A160894
• Unitary imperfect numbers: numbers n that equal to their unitary analog of the alternating sum of divisors, A307037(n).at n=4A307038