added the (digits) tag - this is the closest tag to the topic "number written in decimal form" I was able to find

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edited Oct 18, 2018 at 1:40

The tag (divisors) is intended for divisors in algebraic geometry

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edited Oct 18, 2018 at 0:50

My question: what a formula for finding the number of numbers no greater than n that are divisible by all their suffixes.

e.g: 5, 25, 125, 0125, 70125 are divisors of 70125.

$refinement: \overline{0...0a_1a_2...} = \overline{a_1a_2...}$ refinement: $\overline{0...0a_1a_2...} = \overline{a_1a_2...}$

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asked Oct 17, 2018 at 16:36

The number of numbers no greater than n that are divisible by all their suffixes

My question: what a formula for finding the number of numbers no greater than n that are divisible by all their suffixes.

e.g: 5, 25, 125, 0125, 70125 are divisors of 70125.

$refinement: \overline{0...0a_1a_2...} = \overline{a_1a_2...}$

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