I divisori di 19997990 sono 8, elencati qui di seguito: 1; 2; 5; 10; 1999799; 3999598; 9998995; 19997990
19997971, 19997972, 19997973, 19997974, 19997975, 19997976, 19997977, 19997978, 19997979, 19997980, 19997981, 19997982, 19997983, 19997984, 19997985, 19997986, 19997987, 19997988, 19997989, 19997991, 19997992, 19997993, 19997994, 19997995, 19997996, 19997997, 19997998, 19997999, 19998000, 19998001, 19998002, 19998003, 19998004, 19998005, 19998006, 19998007, 19998008, 19998009