FF · Fully factored
Enter a value, an expression, or a term with a variable like 10^n+1 to list a range.
Switch to Database id to look a number up by its stored id.
Reading never stores anything; use Create to add a number to the database.
See the expression syntax & functions reference.
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Term #2 of the aliquot sequence of
7032
Term #1 of the Inverse home prime · Base 3 sequence of
6879
Term #1 of the Inverse home prime · Base 7 sequence of
4631
Term #1 of the Inverse home prime · Base 9 sequence of
6879
Term #1 of the Aliquot variants · Coreful · s#(n) − n sequence of
15480
Term #1 of the Aliquot variants · Bi-unitary · σ**(n) − n sequence of
11760
Term #1 of the Aliquot variants · Infinitary · σ∞(n) − n sequence of
20160
Term #1 of the Inverse home prime · Base 17 sequence of
994
Term #1 of the Inverse home prime · Base 34 sequence of
1214
Term #1 of the Conway climb · Base 34 sequence of
14297
Term #1 of the Distinct-prime home prime, descending · Base 3 sequence of
6879
Is factor of
From the command linefdb · curl
fdb
fdb number '20640' --detail 2
curl
curl -s 'https://factordb.com:4059/rpc' -H 'Content-Type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"get_number","params":{"target":{"expr":"20640"},"decimal":false,"detail":2}}'