0
A number n for which the sum of all the positive integer factors of n which are less than n add up to n.
For example, 6 and 28 are perfect numbers. The number 6 has factors 1, 2, and 3, and 1 + 2 + 3 = 6. The number 28 has factors 1, 2, 4, 7, and 14, and 1 + 2 + 4 + 7 + 14 = 28
Still curious? Ask our experts.
Chat with our AI personalities
SteveKnowledge is a journey, you know? We'll get there.
Chat with Steve
ViviYour ride-or-die bestie who's seen you through every high and low.
Chat with Vivi
LaoThe path is yours to walk; I am only here to hold up a mirror.
Chat with LaoAdd your answer:
Earn +20 ptsQ: How is 28 a perfect number?
Write your answer...
Submit
Still have questions?
Continue Learning about Geometry
Is 21 a perfect number?
sorry mans it's not but on the bright side 28 is :)
Is 28 a perfect square?
no
What is the smallest whole number that is a perfect square a perfect cube and a perfect fifth power?
the answer is definitly 0 (zero)!
28 is 87.5 percent of what number?
To find the number that 28 is 87.5% of, you can set up the equation: 0.875x = 28. To solve for x, you would divide both sides by 0.875, which gives you x = 32. Therefore, 28 is 87.5% of the number 32.
Is 125 a perfect square-?
No because its a cubed number 53 = 125No
Trending Questions
To construct a angle you first construct an equilateral triangle?
What is the width in millemeters of a 5 carat round rose cut diamond?
What is the point-slope equation of a line with slope -3 that contains the point (-8 -4)?
Part of a line that has 2 endpoints?
What is a congruant shape?
What is the approximate area of the circle with a radius of 7.8?
What is gear geometry?
What shape is the peroxisome?
What is the area of a circle that has a 10 inch diameter?
Area of a rectangle using diagonal and height?
What is the formula for the inside height of a cubiod?
What 3d shape has 10 faces 24 edges and 16 vertices?
What does george Sampson like in a girl?
What are examples of reflex angles?
How much should it cost to put a new roof on a 1300 square foot house?
Which of the following provide shape to the cell?
How many pounds of rebar are in typical concerete per cubic yard?
Name of shape with 3 sides?
How much is 58 inches?
Can you draw a polygon with an area of 10 square centimeters?
Copyright ©2025 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.