I divisori di 1991990 sono 64, elencati qui di seguito: 1; 2; 5; 7; 10; 11; 13; 14; 22; 26; 35; 55; 65; 70; 77; 91; 110; 130; 143; 154; 182; 199; 286; 385; 398; 455; 715; 770; 910; 995; 1001; 1393; 1430; 1990; 2002; 2189; 2587; 2786; 4378; 5005; 5174; 6965; 10010; 10945; 12935; 13930; 15323; 18109; 21890; 25870; 28457; 30646; 36218; 56914; 76615; 90545; 142285; 153230; 181090; 199199; 284570; 398398; 995995; 1991990
1991971, 1991972, 1991973, 1991974, 1991975, 1991976, 1991977, 1991978, 1991979, 1991980, 1991981, 1991982, 1991983, 1991984, 1991985, 1991986, 1991987, 1991988, 1991989, 1991991, 1991992, 1991993, 1991994, 1991995, 1991996, 1991997, 1991998, 1991999, 1992000, 1992001, 1992002, 1992003, 1992004, 1992005, 1992006, 1992007, 1992008, 1992009