18232120

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{97}}^1\times {\mathrm{127}}^1$

素因数の和:272

約数の個数: 64

約数和(自身を含む): 42900480

約数和(自身を除く): 24668360

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 97, 127, 148, 185, 194, 254, 296, 370, 388, 485, 508, 635, 740, 776, 970, 1016, 1270, 1480, 1940, 2540, 3589, 3880, 4699, 5080, 7178, 9398, 12319, 14356, 17945, 18796, 23495, 24638, 28712, 35890, 37592, 46990, 49276, 61595, 71780, 93980, 98552, 123190, 143560, 187960, 246380, 455803, 492760, 911606, 1823212, 2279015, 3646424, 4558030, 9116060, 18232120]

約数ペア:

[(1, 18232120), (2, 9116060), (4, 4558030), (5, 3646424), (8, 2279015), (10, 1823212), (20, 911606), (37, 492760), (40, 455803), (74, 246380), (97, 187960), (127, 143560), (148, 123190), (185, 98552), (194, 93980), (254, 71780), (296, 61595), (370, 49276), (388, 46990), (485, 37592), (508, 35890), (635, 28712), (740, 24638), (776, 23495), (970, 18796), (1016, 17945), (1270, 14356), (1480, 12319), (1940, 9398), (2540, 7178), (3589, 5080), (3880, 4699)]