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primarygun
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How many positive integers less than 500 have exactly 15 positive integer factors?
I know the answer, but not sure it. Can you give me the answer ?
I know the answer, but not sure it. Can you give me the answer ?
matt grime said:I'm not sure I get the hint. 2.3.5.7 has 15 positive integer factors (excluding itself).
CTS said:So it looks like 144 is the only number less than 500 with 15 positive factors, correct?
primarygun said:So answer: 400, 144, and 162
shmoe said:Method looks good, but check how you ended up with 162.
dextercioby said:324 has 17 positive divisors.Excluding 1 and 324,it's left with 15.
Daniel.
Positive integers are whole numbers that are greater than zero. They are denoted by the symbol "n" and can be expressed as 1, 2, 3, 4, etc.
Positive integers are numbers that are greater than zero, while negative integers are numbers that are less than zero. Positive integers are used to count or represent quantities, while negative integers are used to represent debts or losses.
Some examples of positive integers include 5, 10, 100, 1000, and 5000. These numbers are all greater than zero and can be represented on a number line to the right of zero.
No, not all whole numbers are considered positive integers. Whole numbers include both positive and negative integers, while positive integers are only numbers that are greater than zero.
Positive integers are used in many real-life situations, such as counting people, money, or objects. They are also used in mathematical operations, such as addition, multiplication, and division.