6912000

Appears in sequences

• Numbers n such that (phi(n) + sigma(n))/(rad(n))^2 is an integer > 1 (phi=A000010, sigma=A000203, rad=A007947).at n=25A097982
• Numbers k such that (phi(k) + sigma(k))/rad(k)^2 is an integer, that is (phi(k) + sigma(k)) is divisible by every prime factor of k squared.at n=27A121850
• Sorted number of vertices of distinct solutions in the mix of 2 or 3 regular convex 4-polytopes.at n=33A199807
• Duplicate of A199807.at n=33A199810
• Intersection of A025487 and A026477.at n=34A275911
• Smaller of two successive terms of A025487 that have an equal number of divisors.at n=13A375196
• a(n) = 2^(n-3)*(3*binomial(n,4) + 4*binomial(n,2) + 8).at n=14A383868