No. 42 is not a perfect number.
A perfect number is when the sum of the first factors are equal to the number.
An example is 6.
1 × 6 = 6
2 × 3 = 6
3× 2 = 6
1 + 2 + 3 = 6
So 6 is a perfect number.
Another example is 28.
1 × 28 = 28
2 × 14 = 28
4 × 7 = 28
7 × 4 = 28
14 × 2 = 28
1 + 2 + 4 + 7 + 14 = 28
So 28 is a pefect number.
For 42,
1 × 42 = 42
2 × 21 = 42
3 × 14 = 42
6 × 7 = 42
7 × 6 = 42
14 × 3 = 42
21 × 2 = 42
1 + 2 + 3 + 6 + 7 + 14 + 21 = 54
The sum of the first factors of 42 is equal to 54 and not to 42 so it is not a perfect number.
Hope this helps!
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Answers & Comments
No. 42 is not a perfect number.
A perfect number is when the sum of the first factors are equal to the number.
An example is 6.
1 × 6 = 6
2 × 3 = 6
3× 2 = 6
1 + 2 + 3 = 6
So 6 is a perfect number.
Another example is 28.
1 × 28 = 28
2 × 14 = 28
4 × 7 = 28
7 × 4 = 28
14 × 2 = 28
1 + 2 + 4 + 7 + 14 = 28
So 28 is a pefect number.
For 42,
1 × 42 = 42
2 × 21 = 42
3 × 14 = 42
6 × 7 = 42
7 × 6 = 42
14 × 3 = 42
21 × 2 = 42
1 + 2 + 3 + 6 + 7 + 14 + 21 = 54
The sum of the first factors of 42 is equal to 54 and not to 42 so it is not a perfect number.
Hope this helps!