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・ 13, Rue del Percebe
・ 13-centimeter band
・ 13-hydroxydocosanoate 13-beta-glucosyltransferase
・ 13-hydroxylupinine O-tigloyltransferase
・ 13-Hydroxyoctadecadienoic acid
・ 13-Methyltetradecanoic acid
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・ 130
130 (number)
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・ 130 BC
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・ 130 departments of the First French Empire
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・ 130 Liberty Street
・ 130 mm air defense gun KS-30
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・ 130 mm towed field gun M1954 (M-46)
・ 130 mm/50 B13 Pattern 1936
・ 130 mm/55 B7 Pattern 1913
・ 130 nanometer
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130 (number) : ウィキペディア英語版
130 (number)

130 (one hundred () thirty) is the natural number following 129 and preceding 131.
==In mathematics==
130 is a sphenic number. It is a noncototient since there is no answer to the equation ''x'' - φ(''x'') = 130.
130 is the only integer that is the sum of the squares of its first four divisors, including 1: 12 + 22 + 52 + 102 = 130.
130 is the largest number that cannot be written as the sum of four hexagonal numbers.〔(MathWorld - Hexagonal Number )〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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