1. 紀元前より考察されている対象であるにもかかわらず、偶数の完全数が無数に存在するか、奇数の完全数は存在するか、末尾が6か8以外の完全数は存在するか、という問題は未解決である。
    – 完全数 - Wikipedia

    4 months ago  /  21 notes  /  Source: Wikipedia

    1. shuhey reblogged this from kiri2
    2. naotake reblogged this from zenrahanra
    3. zenrahanra reblogged this from hrowl
    4. hrowl reblogged this from flatmountain
    5. kai-fumio reblogged this from flatmountain
    6. hoory reblogged this from flatmountain
    7. nacht-apfel reblogged this from nseki
    8. ds9-garak reblogged this from flatmountain
    9. straycat74 reblogged this from kiri2
    10. tumbmats reblogged this from flatmountain
    11. narukish reblogged this from flatmountain
    12. precall reblogged this from flatmountain
    13. ytsunetsune reblogged this from flatmountain
    14. flatmountain reblogged this from kiri2
    15. kiri2 reblogged this from nseki
    16. nseki posted this