Man1 - factor.1

factor - factor numbers

factor [/NUMBER/]…
factor OPTION

Print the prime factors of each specified integer NUMBER. If none are specified on the command line, read them from standard input.

–help

display this help and exit

–version

output version information and exit

Written by Paul Rubin, Torbjorn Granlund, and Niels Moller.

GNU coreutils online help: https://www.gnu.org/software/coreutils/
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Copyright © 2021 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later https://gnu.org/licenses/gpl.html.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

Full documentation https://www.gnu.org/software/coreutils/factor
or available locally via: info ’(coreutils) factor invocation’