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The positive divisors of 30 are 1, 2, 3, 5, 6, 10, 15 and 30. Thus d(30) =
number of such divisors=8, ľ(30) = sum of such divisors=72 and ľ2(30) =
sum of squares of such divisors= 1 + 4 + 9 + 25 + 100 + 225 + 900 = 1300.
From the formula, since 30=2.3.5, we have d(30 = (1 + 1)(1 + 1)(1 + 1) =
8; ľ(30 = 22
ˇ1
2ˇ1 : 32
ˇ1
3ˇ1 : 52
ˇ1
5ˇ1 = 3
1 : 8
2 : 24
4 = 72 and ľ2(30) = 24
ˇ1
22
ˇ1 : 34
ˇ1
32
ˇ1 : 54
ˇ1
52
ˇ1 =
15
3 : 80
8 : 624
24 = 5:10:26 = 1300.
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Is -8 rational number?
Yes, -8 is a rational number
Is -8 a rational or irrational number?
rational. The fact that you could write it out in a fraction proves that it is.
Is the number 8 rational or irrational?
It is rational.
Is 34 over 8 rational?
Yes. Any rational number divided by any other rational number is a rational number.
Is 7 over 8 a rational number or irrational number?
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yes! 0 divided by 8 is zero- which is a rational number
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The square of a negative number is always positive. The square of -8 = 64, a rational number
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It is rational number expressed as a fraction as 8/1
Is the square of 8 rational?
Yes because 8 times 8 = 64 which is a rational number
Is -8 a irrational number?
Negative 8, which can also be written as -8, is a irrational l number. How? Irrational numbers are numbers that are not rational, and -8 is not rational.
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The square root of 64 is 8, which is a rational number.
