161 (عدد): الفرق بين النسختين

{{Number|number = 161| cardinal = | ordinal = | ordinal text =| numeral =161| prime = | divisor=1,7,23,161| factorization =7×23|roman =CLXI| greek prefix = | latin prefix = |bin =| oct =| duo =| hex =}}

 

</ref><ref>{{harvtxt|Carothers|2000}} says: "ℕ is the set of natural numbers (positive integers)" (p. 3)</ref><ref name="Mac Lane & Birkhoff 1999 p15">{{harvtxt|Mac Lane|Birkhoff|1999}} include zero in the natural numbers: "Intuitively, the set {{math|ℕ {{=}} {{mset|0, 1, 2, ...}}}} of all "natural numbers" may be described as follows: {{math|ℕ}} contains an "initial" number 0; ...". They follow that with their version of the Peano Postulates. (p. 15)</ref>.طبيعي بين [[160 (عدد)|160]] و [[162 (عدد)|162]]