Print the prime factors of each specified integer NUMBER. If none are specified on the command line, read them from standard input.
display this help and exit
output version information and exit
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
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Copyright © 2020 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'
Written by Paul Rubin, Torbjorn Granlund, and Niels Moller.