MathDB
Problems
Contests
National and Regional Contests
USA Contests
USA - Middle School Tournaments
LMT
2021 LMT Spring
A9
2021 LMT Spring Division A Problem 9
2021 LMT Spring Division A Problem 9
Source:
October 22, 2021
Problem Statement
Find the sum of all positive integers
n
n
n
such that
7
<
n
<
100
7<n < 100
7
<
n
<
100
and
157
3
n
1573_{n}
157
3
n
ā
has
6
6
6
factors when written in base
10
10
10
.Proposed by Aidan Duncan
Back to Problems
View on AoPS