34920

Appears in sequences

• Smallest number having exactly n divisors that are not greater than the number's greatest prime factor.at n=21A087134
• a(1) = 1. a(n) = n times (10's complement of a(n-1)).at n=4A110395
• Group the triangular numbers so that the n-th group sum is a multiple of n. 1, (3, 6, 10, 15), (21), (28), (36, 45, 55, 66, 78), (91, 105, 120, 136, 153, 171, 190), ... Sequence contains n-th group sum divided by n.at n=42A114032
• Terms of A061047 ending in 0.at n=36A146950
• Record (maximal) gaps between prime triples (p, p+2, p+6).at n=36A201598
• Pseudoperfect (or semiperfect) numbers k having more than one set of contiguous proper divisors whose sum equals k.at n=2A335742
• Smallest number whose largest odd noncomposite divisor is its n-th divisor.at n=21A384232
• Coefficients in q-expansion of E_2^4 * E_6, where E_2 and E_6 are respectively the Eisenstein series A006352 and A013973.at n=2A386814