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Erdős problem 410

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Let σ1(n)=σ(n)σ_1(n) = σ(n), the sum of divisors function, and σk(n)=σ(σk−1(n))σ_k(n) = σ(σ_{k-1}(n)).

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Problem row
sha256:1a7e368773aee3d5dd9e0c24e75f145afa4883d8587959b3ea6d247981016621
Metadata
sha256:ad7e5916ffb0dfb5e5fe8fa1ef51a30cc0b237626001bce660f7742c5c928cee
Observation
sha256:9c8326e865b6017b103af7611c852a06776d81964979b8ab5a1b800cd550dff6
Content
sha256:6afb85395367f176d118c69560434a84d613e03b7d5bd9ab6a9aac184f067daf
Repository
sha256:a956b84c437202e5a02cc9e036a621bd14a302b34a75758115730bdbb77c52a4
Projection
sha256:a4a96441668a9f8b33afbcb3f696a2639f5fae145f36ddc063d7f67d5fb87ce8
Source commit
36c6d0fef71a3fec84d9dcd5eeca4e22e378f7cb
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