CTA already taken list 1800 1850 1883 1889 1890 1900 1901 1914 1925 1928 1939 1946 1950 1951 1960 1965 1969 (you can band him tho) 1970 - 2050 2100 2200 2300 2400 2500 you can band anyone besides them. https://www.mathwarehouse.com/answered-questions/factors/what-are-the-factors-of-1969-solved.php (answer = 1, 11, 179, & 1969)
