214650

Appears in sequences

• Numbers k such that Sum_{d divides k} sigma(d)/phi(d) is an integer.at n=36A068991
• a(n) = 972*n^2 - 270*n (n>=1).at n=14A305071
• Primitive numbers that are the sum of the squares of two of their distinct divisors.at n=38A338485
• a(n) is the number of large or small squares that are used to tile primitive squares of type 1 whose length of side is A344333(n).at n=34A344334