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Meaning of friendly number | Babel Free

Noun CEFR B2

Definitions

A number that shares its abundancy with another positive integer.

Examples

“The number 30 is a friendly number because both 30 and 140 have an abundancy index of 2.4.”

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

friendly society friendly suit friendly URL friendmaking friendmance friendo