Oh, dude, that's an easy one. The numbers with the most factors are the ones with the most divisors, like 60 and 72. They have 12 factors each, beating out all the other numbers from 1 to 100. So, if you're throwing a math party and need some numbers with lots of friends, those are the ones to invite.
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Numbers with the most factors are highly composite numbers, which are typically numbers with many small prime factors. In the range from 1 to 100, the number 60 has the most factors, with 12 factors. This is because 60 can be factored into 2^2 * 3 * 5, giving it factors of 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60.
60, 72, 84, 90 and 96 each have 12 factors.
Three numbers.
All the numbers up to 100 are factors in some numbers up to 100. For example, 1 is a factor of every number and 2 is a factor of all the even numbers. The numbers greater than 50 are only factors of themselves among the numbers up to 100, 95 is only a factor of itself, because the next number for which it is a factor is 190, which is greater than 100.
The common factors are: 1, 2, 4
The factors of 100 are 1, 2, 4, 5, 10, 20, 25, 50, and 100. The factors of 45 are 1, 3, 5, 9, 15, and 45. Factors are numbers that can be multiplied together to give the original number.