Which of the numbers 19,21,23, and 25 has the most factors

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asked Dec 19, 2016 229k views

2 Answers

Full Time Skeleton · Answer 1 · 2016-12-26T07:46:36+0000

First let's find the factors of each number:
19: 1,19
21: 1,3,7,21
23: 1,23
25: 1,5,25
21 has 4 factors, 25 has 3 and 23 and 19 are both prime numbers (with two factors). 21 has the most factors.

Which of the numbers 19,21,23, and 25 has the most factors

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