Amicable Number (220, 284)

Genesis 32:14 “Jacob gives Esau 200 she-goats and 20 he-goats, 200 ewes & 20 rams…”
In the Bible story, Jacob cheated his elder brother Esau for the inheritance from their father Issac, Esau was angry. To show friendship later, Jacob gave him 220 (=200+20) goats, 220 (=200+20) ewes & rams.

Amicable Number = (220, 284): Sum of all factors of 220 = 284, vice versa.
220 = 1+2+4+5+10+11+20+22+44+55+110 = 284
284 =1+2+4+71+142= 220
Give Amicable 220 => to exchange friendship (284)

Discovered by Arab Thabit bin Qurra (836 AD)
1)al-Farisis (13 AD): 17,296  & 18,416
(before Euler in 18 CE)

2) Muhammed Baqir Yazdin (17 CE): 9,363,584  & 9,437,056

Other Amicable numbers:
1184 & 1210
2620 & 2924
5020 & 5564
6232 & 6368
10744 & 10856

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