Ubuntu – Ubuntu 13.10 problems in apt-get update

I recently install Ubuntu 13.10, but I had several difficulties on installing several programs from 'Ubuntu Software Center'. I tried to update the repositories but I get the follow result:

Ign http://security.ubuntu.com saucy-security InRelease
Ign http://extras.ubuntu.com saucy InRelease
Hit http://security.ubuntu.com saucy-security Release.gpg
Hit http://extras.ubuntu.com saucy Release.gpg
Hit http://security.ubuntu.com saucy-security Release
Hit http://extras.ubuntu.com saucy Release
Hit http://security.ubuntu.com saucy-security/main Sources
Hit http://extras.ubuntu.com saucy/main Sources
Hit http://security.ubuntu.com saucy-security/restricted Sources
Hit http://extras.ubuntu.com saucy/main amd64 Packages
Hit http://security.ubuntu.com saucy-security/universe Sources
Hit http://extras.ubuntu.com saucy/main i386 Packages
Hit http://security.ubuntu.com saucy-security/multiverse Sources
Hit http://security.ubuntu.com saucy-security/main amd64 Packages
Hit http://security.ubuntu.com saucy-security/restricted amd64 Packages
Hit http://security.ubuntu.com saucy-security/universe amd64 Packages
Hit http://security.ubuntu.com saucy-security/multiverse amd64 Packages
Hit http://security.ubuntu.com saucy-security/main i386 Packages
Hit http://security.ubuntu.com saucy-security/restricted i386 Packages
Hit http://security.ubuntu.com saucy-security/universe i386 Packages
Hit http://security.ubuntu.com saucy-security/multiverse i386 Packages
Ign http://extras.ubuntu.com saucy/main Translation-en_US
Ign http://extras.ubuntu.com saucy/main Translation-en
Hit http://security.ubuntu.com saucy-security/main Translation-en
Hit http://security.ubuntu.com saucy-security/multiverse Translation-en
Hit http://security.ubuntu.com saucy-security/restricted Translation-en
Hit http://security.ubuntu.com saucy-security/universe Translation-en
Ign http://security.ubuntu.com saucy-security/main Translation-en_US
Ign http://security.ubuntu.com saucy-security/multiverse Translation-en_US
Ign http://security.ubuntu.com saucy-security/restricted Translation-en_US
Ign http://security.ubuntu.com saucy-security/universe Translation-en_US
Err http://us.archive.ubuntu.com saucy InRelease
Err http://us.archive.ubuntu.com saucy-updates InRelease
Err http://us.archive.ubuntu.com saucy-backports InRelease
Err http://us.archive.ubuntu.com saucy Release.gpg
  Cannot initiate the connection to us.archive.ubuntu.com:80 (2001:67c:1562::14). - connect (101: Network is unreachable) [IP: 2001:67c:1562::14 80]
Err http://us.archive.ubuntu.com saucy-updates Release.gpg
  Cannot initiate the connection to us.archive.ubuntu.com:80 (2001:67c:1562::14). - connect (101: Network is unreachable) [IP: 2001:67c:1562::14 80]
Err http://us.archive.ubuntu.com saucy-backports Release.gpg
  Cannot initiate the connection to us.archive.ubuntu.com:80 (2001:67c:1562::14). - connect (101: Network is unreachable) [IP: 2001:67c:1562::14 80]
Reading package lists... Done
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy/InRelease
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-updates/InRelease
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-backports/InRelease
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy/Release.gpg  Cannot initiate the connection to us.archive.ubuntu.com:80 (2001:67c:1562::14). - connect (101: Network is unreachable) [IP: 2001:67c:1562::14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-updates/Release.gpg  Cannot initiate the connection to us.archive.ubuntu.com:80 (2001:67c:1562::14). - connect (101: Network is unreachable) [IP: 2001:67c:1562::14 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-backports/Release.gpg  Cannot initiate the connection to us.archive.ubuntu.com:80 (2001:67c:1562::14). - connect (101: Network is unreachable) [IP: 2001:67c:1562::14 80]
W: Some index files failed to download. They have been ignored, or old ones used instead.

I want to install Seaview, Dropbox, Terminator and the IDLE of python 2.7, but I can't since I get 'There isn't a software package called <program to install> in your current software sources' or 'Available from the "multiverse" source. However, for this last one, when I do click over "Use this Source" nothing happens.

I need help. Tx to all.