AMC 10 Step by Step
Log inSign up
Printable

2021 AMC 10B Problem 12

Include the solutionBack to the problem
2021 AMC 10B Problem 12AMC 10 Step by Step
Name:                             Date: September 13, 2026
Divisibility & Factors · difficulty 3 of 5 · about 3 min · position P11-15

Let N=34⋅34⋅63⋅270N = 34 \cdot 34 \cdot 63 \cdot 270 . What is the ratio of the sum of the odd divisors of NN to the sum of the even divisors of NN ?

  1. A)

    1:161 : 16

  2. B)

    1:151 : 15

  3. C)

    1:141 : 14

  4. D)

    1:81 : 8

  5. E)

    1:31 : 3

Working