19982004

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1999}}^1$

素因数の和:2037

約数の個数: 72

約数和(自身を含む): 57456000

約数和(自身を除く): 37473996

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 17, 21, 28, 34, 42, 49, 51, 68, 84, 98, 102, 119, 147, 196, 204, 238, 294, 357, 476, 588, 714, 833, 1428, 1666, 1999, 2499, 3332, 3998, 4998, 5997, 7996, 9996, 11994, 13993, 23988, 27986, 33983, 41979, 55972, 67966, 83958, 97951, 101949, 135932, 167916, 195902, 203898, 237881, 293853, 391804, 407796, 475762, 587706, 713643, 951524, 1175412, 1427286, 1665167, 2854572, 3330334, 4995501, 6660668, 9991002, 19982004]

約数ペア:

[(1, 19982004), (2, 9991002), (3, 6660668), (4, 4995501), (6, 3330334), (7, 2854572), (12, 1665167), (14, 1427286), (17, 1175412), (21, 951524), (28, 713643), (34, 587706), (42, 475762), (49, 407796), (51, 391804), (68, 293853), (84, 237881), (98, 203898), (102, 195902), (119, 167916), (147, 135932), (196, 101949), (204, 97951), (238, 83958), (294, 67966), (357, 55972), (476, 41979), (588, 33983), (714, 27986), (833, 23988), (1428, 13993), (1666, 11994), (1999, 9996), (2499, 7996), (3332, 5997), (3998, 4998)]