ローマ数字 |  |  | I 1 |  |  | II 2 |  |  | III 3 |  |  | IV 4 |  |  | V 5 |  |  | VI 6 |  |  | VII 7 |  |  | VIII 8 |  |  | IX 9 |  |  | X 10 |  |  | XI 11 |  |  | XII 12 |  |  | XIII 13 |  |  | XIV 14 |  |  | XV 15 |  |  | XVI 16 |  |  | XVII 17 |  |  | XVIII 18 |  |  | XIX 19 |  |  | XX 20 |  |  | XXI 21 |  |  | XXII 22 |  |  | XXX 30 |  |  | XL 40 |  |  | XLI 41 |  |  | XLVIII 48 |  |  | XLIX 49 |  |  | L 50 |  |  | LX 60 |  |  | LXX 70 |  |  | LXXX 80 |  |  | XC 90 |  |  | C 100 |  |  | CI 101 |  |  | CII 102 |  |  | CC 200 |  |  | CCC 300 |  |  | CD 400 |  |  | D 500 |  |  | DC 600 |  |  | DCC 700 |  |  | DCCC 800 |  |  | CM 900 |  |  | M 1000 |  |  | MM 2000 |  |  | |  |  | |
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