18678140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{199}}^1$

素因数の和:259

約数の個数: 72

約数和(自身を含む): 44805600

約数和(自身を除く): 26127460

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 199, 247, 260, 361, 380, 398, 494, 722, 796, 988, 995, 1235, 1444, 1805, 1990, 2470, 2587, 3610, 3781, 3980, 4693, 4940, 5174, 7220, 7562, 9386, 10348, 12935, 15124, 18772, 18905, 23465, 25870, 37810, 46930, 49153, 51740, 71839, 75620, 93860, 98306, 143678, 196612, 245765, 287356, 359195, 491530, 718390, 933907, 983060, 1436780, 1867814, 3735628, 4669535, 9339070, 18678140]

約数ペア:

[(1, 18678140), (2, 9339070), (4, 4669535), (5, 3735628), (10, 1867814), (13, 1436780), (19, 983060), (20, 933907), (26, 718390), (38, 491530), (52, 359195), (65, 287356), (76, 245765), (95, 196612), (130, 143678), (190, 98306), (199, 93860), (247, 75620), (260, 71839), (361, 51740), (380, 49153), (398, 46930), (494, 37810), (722, 25870), (796, 23465), (988, 18905), (995, 18772), (1235, 15124), (1444, 12935), (1805, 10348), (1990, 9386), (2470, 7562), (2587, 7220), (3610, 5174), (3781, 4940), (3980, 4693)]