18640330

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{199}}^1$

素因数の和:271

約数の個数: 64

約数和(自身を含む): 38880000

約数和(自身を除く): 20239670

約数列:

[1, 2, 5, 10, 17, 19, 29, 34, 38, 58, 85, 95, 145, 170, 190, 199, 290, 323, 398, 493, 551, 646, 986, 995, 1102, 1615, 1990, 2465, 2755, 3230, 3383, 3781, 4930, 5510, 5771, 6766, 7562, 9367, 11542, 16915, 18734, 18905, 28855, 33830, 37810, 46835, 57710, 64277, 93670, 98107, 109649, 128554, 196214, 219298, 321385, 490535, 548245, 642770, 981070, 1096490, 1864033, 3728066, 9320165, 18640330]

約数ペア:

[(1, 18640330), (2, 9320165), (5, 3728066), (10, 1864033), (17, 1096490), (19, 981070), (29, 642770), (34, 548245), (38, 490535), (58, 321385), (85, 219298), (95, 196214), (145, 128554), (170, 109649), (190, 98107), (199, 93670), (290, 64277), (323, 57710), (398, 46835), (493, 37810), (551, 33830), (646, 28855), (986, 18905), (995, 18734), (1102, 16915), (1615, 11542), (1990, 9367), (2465, 7562), (2755, 6766), (3230, 5771), (3383, 5510), (3781, 4930)]