The U. S. coins, a plastic bag

2002

cf. 5020 and 5564 are the fourth smallest amicable pair which Euler found in 1747.

(Two numbers are called amicable if each equals to the sum of the divisors of the other.)

Divisors of 5020: 1 + 2 + 4 + 5 + 10 + 20 + 251 + 502 + 1004 + 1255 + 2510 = 5564

Divisors of 5564: 1 + 2 + 4 + 13 + 26 + 52 + 107 + 214 + 428 + 1391 + 2782 = 5020