What is the sum of the reciprocals of all divisors of 120?
120的所有约数的倒数相加的和是多少．
<gadget id="calculator">1 + 2 + 3 + 4 + 5 + 6 + 8 + 10 + 12 + 15 + 20 + 24 + 30 + 40 + 60 + 120</gadget>
<output>360</output>

<gadget id="calculator">360 / 120</gadget>
<output>3</output>

<result>3</result>