I divisori di 201980 sono 12, elencati qui di seguito: 1; 2; 4; 5; 10; 20; 10099; 20198; 40396; 50495; 100990; 201980
201961, 201962, 201963, 201964, 201965, 201966, 201967, 201968, 201969, 201970, 201971, 201972, 201973, 201974, 201975, 201976, 201977, 201978, 201979, 201981, 201982, 201983, 201984, 201985, 201986, 201987, 201988, 201989, 201990, 201991, 201992, 201993, 201994, 201995, 201996, 201997, 201998, 201999