18656380

Appears in sequences

• Sociable numbers: smallest member of each cycle (conjectured).at n=8A003416
• A 4-cycle of the k => sigma(k)-k process, where sigma(k) is the sum of divisors of k (A000203).at n=0A073033
• A 4-cycle of the k => sigma(k)-k process, where sigma(k) is the sum of divisors of k (A000203).at n=4A073033
• A 4-cycle of the k => sigma(k)-k process, where sigma(k) is the sum of divisors of k (A000203).at n=8A073033
• A 4-cycle of the k => sigma(k)-k process, where sigma(k) is the sum of divisors of k (A000203).at n=12A073033
• A 4-cycle of the k => sigma(k)-k process, where sigma(k) is the sum of divisors of k (A000203).at n=16A073033
• A 4-cycle of the k => sigma(k)-k process, where sigma(k) is the sum of divisors of k (A000203).at n=20A073033
• Smallest member of sociable quadruples.at n=6A090615
• Smallest member of sociable quadruples with signature: abundant, abundant, deficient, deficient.at n=4A222975
• Conjectured list of numbers in increasing order that belong to sociable cycles of length greater than 2 in which the sum of the cycle is divisible by 10.at n=8A292217