deficient number造句

• All prime powers are deficient numbers.
• The second group of lemmas deals more specifically with the formation of perfect, abundant and deficient numbers.
• Numbers that fulfill the strict form of the inequality in the above definition are known as \ mathcal { S }-deficient numbers.
• That is, the \ mathcal { S }-deficient numbers are the natural numbers that are strictly less than the sum of their divisors in \ mathcal { S }.
• Numbers whose sum of proper factors equals the number itself ( such as 6 and 28 ) are called perfect numbers, while numbers whose sum of proper factors is less than the number itself are called deficient numbers.
• The perfect numbers early on came to be treated as the measure of other numbers : those in which the sum of the divisors is greater than the number itself, as in 12, have  since as early as Theon of Smyrna, ca . 130 A . D .  been called " redundant " ( ), " more than perfect " ( " plus quam perfecti " ), or " abundant numbers ", and those the sum of whose divisors is smaller, as in 8, have been called " deficient numbers " ( " deficientes " ).