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crimeas [40]
3 years ago
13

This is really difficult for me. If someone could help me I would really appreciate it.

Mathematics
2 answers:
-Dominant- [34]3 years ago
4 0
Since we can add up the factors of 28 (excluding 28 itself) to get
1+2+4+7+14 = 28
this means that 28 is a perfect number. In the interval from 20 to 30, it is the only perfect number.

Answer: 28

Note: Something like 22 is not a perfect number since
1+2+11 = 14
which isn't 22 like we want. Every number, in the interval from 20 to 30, but 28 has this problem. 
Dmitrij [34]3 years ago
3 0
<span>20, 21, 22, 24, 25, 26, 27, 28, 30. hope that helped</span>
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Step-by-step explanation:

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