divisibility question: if two integers can both divide each other, do they have to be equal?
46286
Prove if $a\mid b$ and $b\mid a$, then $|a|=|b|$ , $a, b$ are integers.
128199
Proving gcd(a, a+2) is 1 or 2 for every integer a?
147527
Let $a$ and $b$ be non-zero integers, and $c$ be an integer. Let $d = \gcd(a, b)$. Prove that if $a|c$ and $b|c$ then $ab|cd$.
41295
Divisibility, LCM and GCD for fractions (rationals)
108746
Prove that there exist two integers such that i - j is divisible by n.
120573
Does $a!b!$ always divide $(a+b)!$
3378
Simplest way to check if two integers have same sign?
94770
Greatest common divisor of two positive integers
117761
When is $\binom{n}{k}$ divisible by $n$?
31312
If a prime divides a product then it must divide a factor of the product [Euclid's Lemma]
11168
Proof of divisibility: if $a|b$ and $a|(b+c)$ then $a|c$
31701
Check if two integers have the same sign
51365
Why dividing two integers doesn't get a float?
34784
Is a number meeting these conditions divisible by forty-nine?
1991
If $\gcd(a,b)=1$ and $a$ and $b$ divide $c$, then so does $ab$
57938
When do two functions become equal?
15191
If $a^2$ divides $b^2$, then $a$ divides $b$