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When the number is a square of a Prime number. Of course, it will have a repeated factor, but it will still only have 3 distinct factors. 4, 9, 25, 49, 121 are some examples.
What else can I help you with?
What are the factors of 3 and 20?
A factor = a number which can be divided into the given number with no remainder so no, 3 is not a factor of 20
What are the prime factors for 2-200?
202
What do we know about a number that has an odd number of distinct factors?
It's a perfect square.
Does a perfect square number have and even or odd number of distinct factors show how you determine your answer?
Odd. I determined my answer by looking at the number of factors of a square number.
What number do you get when multiplying distinct (different)prime factors in 28?
14
Is 3 a prime number because it doesn't have any factors?
3 is a prime number because it has exactly two distinct factors. The only factors of a prime number are 1 and itself. The only factors of 3 are 1 and 3, so it is a prime number.
How many distinct factors does the number 64 have?
Seven distinct factors.
How many distinct prime factors does the number 36 have?
2. 2 and 3
What number has exactly 3 prime factors?
There are an infinite number of them. 8 has three prime factors, 30 is the first with three distinct prime factors.
What is the least natural number that has exactly 4 distinct odd factors?
3*5*7*9 = 945 ...check if any number less than that has exactly four distinct factors.
Is 513 a prime number?
no. 513=3^3×19 (4 prime factors, 2 distinct)
What is the smallest natural number that has 3 distinct prime factors in its factorization?
2*3*5 = 30
What number has 3 distinct factors with prime factorization?
2 x 3 x 5 = 30
What is the third smallest natural number that has exactly four distinct positive factors?
3
What number less than 100 has exactly 4 prime factors?
There is more than one possible answer. The prime factors of 16 are 2, 2, 2, and 2. It has four prime factors, but only one distinct prime factor. The prime factors of 24 are 2, 2, 2, and 3. It has four prime factors, but only two distinct prime factors. The prime factors of 36 are 2, 2, 3, and 3. It has four prime factors, but only two distinct prime factors. The prime factors of 40 are 2, 2, 2, and 5. It has four prime factors, but only two distinct prime factors. The prime factors of 54 are 2, 3, 3, and 3. It has four prime factors, but only two distinct prime factors. The prime factors of 56 are 2, 2, 2, and 7. It has four prime factors, but only two distinct prime factors. The prime factors of 60 are 2, 2, 3, and 5. It has four prime factors, but only three distinct prime factors. The prime factors of 81 are 3, 3, 3, and 3. It has four prime factors, but only one distinct prime factor. The prime factors of 84 are 2, 2, 3, and 7. It has four prime factors, but only three distinct prime factors. The prime factors of 88 are 2, 2, 2, and 11. It has four prime factors, but only two distinct prime factors. The prime factors of 90 are 2, 3, 3, and 5. It has four prime factors, but only three distinct prime factors.
How many distinct prime factors does 168 have?
Three distinct prime factors.
Can you Name a number that has a prime factorization with three distinct factors?
How about: 2*3*5 = 30
