In This Way ^^

1872000 days / 144000 = 13 (13 x 5 = 65) x 8 = 520 = 260 Tzolkin plus 260 Tzolkin
1872000 days / 14400 = 130 (130 x 5 = 650) x 8 = 5200 = 2600 plus 2600, Ten Tzolkin

1872000 days / 1440 = 1300 (260 x 5 = 1300) x 8 = 10400 = 260 Tzolkin x 5