Identify all whole number factors of 63.

Question

Responses:
{1, 3, 9, 21, 63}
{1, 3, 7, 9, 21, 63}
{1, 2, 3, 21, 63}
{1, 7, 9, 63}

Answer 1

{1, 3, 7, 9, 21, 63}