18281080

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 43001280

約数和(自身を除く): 24720200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 71, 82, 142, 157, 164, 205, 284, 314, 328, 355, 410, 568, 628, 710, 785, 820, 1256, 1420, 1570, 1640, 2840, 2911, 3140, 5822, 6280, 6437, 11147, 11644, 12874, 14555, 22294, 23288, 25748, 29110, 32185, 44588, 51496, 55735, 58220, 64370, 89176, 111470, 116440, 128740, 222940, 257480, 445880, 457027, 914054, 1828108, 2285135, 3656216, 4570270, 9140540, 18281080]

約数ペア:

[(1, 18281080), (2, 9140540), (4, 4570270), (5, 3656216), (8, 2285135), (10, 1828108), (20, 914054), (40, 457027), (41, 445880), (71, 257480), (82, 222940), (142, 128740), (157, 116440), (164, 111470), (205, 89176), (284, 64370), (314, 58220), (328, 55735), (355, 51496), (410, 44588), (568, 32185), (628, 29110), (710, 25748), (785, 23288), (820, 22294), (1256, 14555), (1420, 12874), (1570, 11644), (1640, 11147), (2840, 6437), (2911, 6280), (3140, 5822)]