I divisori di 19902980 sono 24, elencati qui di seguito: 1; 2; 4; 5; 10; 20; 43; 86; 172; 215; 430; 860; 23143; 46286; 92572; 115715; 231430; 462860; 995149; 1990298; 3980596; 4975745; 9951490; 19902980
19902961, 19902962, 19902963, 19902964, 19902965, 19902966, 19902967, 19902968, 19902969, 19902970, 19902971, 19902972, 19902973, 19902974, 19902975, 19902976, 19902977, 19902978, 19902979, 19902981, 19902982, 19902983, 19902984, 19902985, 19902986, 19902987, 19902988, 19902989, 19902990, 19902991, 19902992, 19902993, 19902994, 19902995, 19902996, 19902997, 19902998, 19902999