209160

Appears in sequences

• Number of degree-n permutations of order exactly 4.at n=9A001473
• Least number k such that sigma_2(k) >= 2^n.at n=35A141847
• a(n) is the smallest number k >= 1 with exactly n divisors d, for which sigma(k) is divisible by d*sigma(d).at n=31A344103