Factors and Prime Factors

What you can do

• Arrange up to 144 squares in rows of a chosen length: a full rectangle gives a factor pair, an incomplete last row shows the remainder.
• Show all the rectangles for a number at once, with the list of its factors and whether it is prime or composite.
• Build a factor tree by choosing how to split each number, or draw two different trees and see that the prime factorisation is the same.
• See every factor in a table built from the prime factorisation, and decide from the prime factors whether a number is divisible, with a check.
• Print a worksheet with a squared grid, factor trees, a factor table or divisibility questions, or save the drawing as a PNG.

Pictures in the Gallery9

Ready-made pictures made in this app, to download as PNG.

Rectangles from 12 squares (factors of 12) Rectangles from 24 squares (factors of 24) Rectangles from 36 squares (factors of 36) Division with remainder: 12 squares in rows of 5 Factor tree of 60 Factor tree of 72 Two factor trees of 60 Factor table of 60

• All pictures: Factors and prime factors 9

Worksheets and lessons

Lessons with worksheets that use this app.

• Divisibility

More apps: Numbers

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