557375
domain: N
Appears in sequences
- Primitive numbers k that divide sigma(k)*phi(k).at n=22A055196
- Pairs of primitive deficient numbers having the same value of sigma(k)/k, listed by increasing value of the larger of the two k values.at n=10A212610
- Primitive deficient numbers n having a companion m > n such that sigma(n)/n = sigma(m)/m (ordered by increasing (smallest possible) m).at n=5A212611
- Successive integers produced by Conway's PRIMEGAME, starting with 12 rather than 2.at n=10A273099
- Odd numbers k such that rad(k) divides sigma(k).at n=30A336554