Answer:
{1, 2, 3, 6, 13, 28, 39, 78}
Step-by-step explanation:
DIVISIBILITY RULES.
78
a) Any number is divisible by 1.
78÷1 = 78 ---> factors: {1, 78}
b) Since 8 in the ones place is even, then 78 is divisible by 2.
78÷2 = 39 ---> factors: {2,39}
c) 7+8 = 15. 15 is multiples of 3, therefore 78 is divisible by 3.
78÷3 = 28 ---> factors: {3, 28}
d) Since 78 is divisible by 2 and 3, then 78 is divisible by 6.
78÷6 = 13 ---> factors: {6, 13}
