How many positive integers will divide evenly into 560?	Select the correct option:
A) 8
B) 12
C) 16
D) 18
E) 20
520 = 10*13*4 = 8*5*13 = 2^3*5*13   We need to positive integers will divide evenly into 520 or simply the factors of 520   If a number is of the form 2^a*3^b*5^c,   Total factors = (a+1)(b+1)(c+1)   Therefore, number of factors of 520 = (3+1)*(1+1)*(1+1) = 4*2*2 = 20   Option 20
<result>E</result>
How many positive integers will divide evenly into 560?