1481089
domain: N
Appears in sequences
- Least square k^2 > n^2 whose decimal expansion ends in n^2.at n=33A090292
- Numbers k that require four iterations of the sigma function to be >= 2*k.at n=22A107914
- Odd numbers N for which numerator(sigma(N)/N) is a prime.at n=37A193065
- Numbers k such that tau(sigma(tau(k))) = sigma(tau(sigma(k))), where tau is A000005 and sigma is A000203.at n=32A237613
- Odd numbers with prime sum of divisors.at n=35A278911
- Numbers k for which A348717(k) is a multiple of A348717(sigma(k)).at n=48A364131