205405200

Appears in sequences

• Numbers k such that sigma(k) > 5*k.at n=3A215264
• Integers m such that there is exactly one k < m with sigma(k)/k > sigma(m)/m, sigma(m) being the sum of the divisors of m.at n=31A247022
• Numerator of the harmonic mean of the first n composite numbers.at n=18A250132
• Primitive 5-abundant numbers: Numbers k such that sigma(k) > 5k (A215264) all of whose proper divisors d are 5-deficient numbers (having sigma(d) < 5d).at n=3A307115