18911984

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{419}}^1$

素因数の和:478

約数の個数: 80

約数和(自身を含む): 46663680

約数和(自身を除く): 27751696

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 31, 52, 56, 62, 91, 104, 112, 124, 182, 208, 217, 248, 364, 403, 419, 434, 496, 728, 806, 838, 868, 1456, 1612, 1676, 1736, 2821, 2933, 3224, 3352, 3472, 5447, 5642, 5866, 6448, 6704, 10894, 11284, 11732, 12989, 21788, 22568, 23464, 25978, 38129, 43576, 45136, 46928, 51956, 76258, 87152, 90923, 103912, 152516, 168857, 181846, 207824, 305032, 337714, 363692, 610064, 675428, 727384, 1181999, 1350856, 1454768, 2363998, 2701712, 4727996, 9455992, 18911984]

約数ペア:

[(1, 18911984), (2, 9455992), (4, 4727996), (7, 2701712), (8, 2363998), (13, 1454768), (14, 1350856), (16, 1181999), (26, 727384), (28, 675428), (31, 610064), (52, 363692), (56, 337714), (62, 305032), (91, 207824), (104, 181846), (112, 168857), (124, 152516), (182, 103912), (208, 90923), (217, 87152), (248, 76258), (364, 51956), (403, 46928), (419, 45136), (434, 43576), (496, 38129), (728, 25978), (806, 23464), (838, 22568), (868, 21788), (1456, 12989), (1612, 11732), (1676, 11284), (1736, 10894), (2821, 6704), (2933, 6448), (3224, 5866), (3352, 5642), (3472, 5447)]