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132 (number) : ウィキペディア英語版
132 (number)

132 (one hundred () thirty-two) is the natural number following 131 and preceding 133.
==In mathematics==
132 is the sixth Catalan number. It is a pronic number, the product of 11 and 12. As it has 12 divisors total, 132 is a refactorable number.
If you take the sum of all 2-digit numbers you can make from 132, you get 132: 12 + 13 + 21 + 23 + 31 + 32 = 132. 132 is the smallest number with this property,〔Wells, D. ''The Penguin Dictionary of Curious and Interesting Numbers'' London: Penguin Group. (1987): 138〕 which is shared by 264, 396 and 35964 (see digit-reassembly number).
But there is no number that, when added to the sum of its own digits, sums to 132, therefore 132 is a self number. 132 is also a Harshad number, divisible by the sum of its base-ten digits.

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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