Натуральные числа. Этюды, вариации, упражнения. Владимир Валентинович Трошин
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СКАЧАТЬ меньше p2 необычны. Первые несколько необычных чисел: 2, 3, 5, 6, 7, 10, 11, 13, 14, 15, 17, 19, 20, 21, 22, 23, 26, 28, 29, 31, 33, 34, 35, … .

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      Сфеническое натуральное число (от др.-греч. сфена – клин) – число, равное произведению трёх различных простых чисел (так, например, 30=2·3·5; соответственно, число 30 является первым сфеническим). Количество делителей произвольного сфенического числа всегда равно 8. Например, если n

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