LCM(21, 42, 82, 105) = 8610.
All My Children - 1970 1-8610 was released on: USA: 4 June 2003
Days of Our Lives - 1965 1-8610 was released on: USA: 17 August 1999
21 + 140 + 700 = 861 861 x 10 = 8610 8610 + 861 = 9471 = 77 x 123
The Young and the Restless - 1973 1-8610 was released on: USA: 2 April 2007
6061-t651 = 5410
Itself and any of its multiples
5410 = 1101102
The Bold and the Beautiful - 1987 1-5410 was released on: USA: 2 October 2008
861.0
1.4566
541 x 10 = 5410