Provided by: coreutils_8.28-1ubuntu1_amd64 

NAME
factor - factor numbers
SYNOPSIS
factor [NUMBER]...
factor OPTION
DESCRIPTION
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
AUTHOR
Written by Paul Rubin, Torbjorn Granlund, and Niels Moller.
REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report factor translation bugs to <http://translationproject.org/team/>
COPYRIGHT
Copyright © 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later
<http://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.
SEE ALSO
Full documentation at: <http://www.gnu.org/software/coreutils/factor>
or available locally via: info '(coreutils) factor invocation'
GNU coreutils 8.28 January 2018 FACTOR(1)