The factors of 1431 are: 1, 3, 9, 27, 53, 159, 477, 1431.
Berber nomads seized much of Mali's territory. The captured Timbuktu in 1431.
1431=3x3x3x53
No. 477*3=1431
1431 = MCDXXXI
2012 - 1431 = 581
1431 km is 889.18 miles.
The idea is to subtract the current year, minus 1431.
1431.
1, 2, 3, 6, 9, 18, 27, 53, 54, 106, 159, 318, 477, 954, 1431, 2862
l'année mille quatre cent trente et un l'année 1431
It goes: 1431/16 = 89 times with a remainder of 7
it was about 1431 I supose