527872

Appears in sequences

• Numbers m such that 2*m - sigma(m) is a divisor of m and greater than one, where sigma = A000203 is the sum of divisors.at n=25A060326
• Numbers k with abundance radius of 8, i.e., abs(sigma(k)-2*k) = 8.at n=22A088820
• Numbers k whose abundance sigma(k) - 2*k = -8. Numbers k whose deficiency is 8.at n=11A125247
• Deficient numbers with increasing abundancy without being powers of 2.at n=14A228450
• Numbers a(n) = 2^(n-1) * f(n), where n >= 1 and f(n) is the smallest prime number larger than 2^n (A014210).at n=9A246956
• a(n) = 2^(n-1)*(2^n+7).at n=10A257272
• Deficient-perfect numbers: Deficient numbers n such that n/(2n-sigma(n)) is an integer.at n=45A271816
• Numbers k such that sigma(k) == 0 (mod k-4).at n=17A274554
• Numbers n for which A294898(n) is not zero and A294898(n) divides A000120(n); numbers for which A326130(n) = abs(A294898(n)).at n=30A326132