20522060

Appears in sequences

• A 4-cycle of the k => sigma(k)-k process, where sigma(k) is the sum of divisors of k (A000203).at n=1A073033
• A 4-cycle of the k => sigma(k)-k process, where sigma(k) is the sum of divisors of k (A000203).at n=5A073033
• A 4-cycle of the k => sigma(k)-k process, where sigma(k) is the sum of divisors of k (A000203).at n=9A073033
• A 4-cycle of the k => sigma(k)-k process, where sigma(k) is the sum of divisors of k (A000203).at n=13A073033
• A 4-cycle of the k => sigma(k)-k process, where sigma(k) is the sum of divisors of k (A000203).at n=17A073033
• A 4-cycle of the k => sigma(k)-k process, where sigma(k) is the sum of divisors of k (A000203).at n=21A073033
• 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=9A292217