Harshad number
A city in Ternopil Oblast, in western Ukraine.
(archaic) Tamil
(meteorology) A fogbow seen in clouds, typically from an aircraft looking downwards.
(mathematics) A positive integer which is divisible by the sum of all of its digits.
数学者は、18がハーシャッド数(すなわち桁の和で割り切れる正の整数)であることを、1 + 8 = 9で割り切れることを示して説明した。
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