21000388660

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^2\times {\mathrm{27961}}^1$

素因数の和:28081

約数の個数: 72

約数和(自身を含む): 47711336904

約数和(自身を除く): 26710948244

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 47, 68, 85, 94, 170, 188, 235, 340, 470, 799, 940, 1598, 2209, 3196, 3995, 4418, 7990, 8836, 11045, 15980, 22090, 27961, 37553, 44180, 55922, 75106, 111844, 139805, 150212, 187765, 279610, 375530, 475337, 559220, 751060, 950674, 1314167, 1901348, 2376685, 2628334, 4753370, 5256668, 6570835, 9506740, 13141670, 22340839, 26283340, 44681678, 61765849, 89363356, 111704195, 123531698, 223408390, 247063396, 308829245, 446816780, 617658490, 1050019433, 1235316980, 2100038866, 4200077732, 5250097165, 10500194330, 21000388660]

約数ペア:

[(1, 21000388660), (2, 10500194330), (4, 5250097165), (5, 4200077732), (10, 2100038866), (17, 1235316980), (20, 1050019433), (34, 617658490), (47, 446816780), (68, 308829245), (85, 247063396), (94, 223408390), (170, 123531698), (188, 111704195), (235, 89363356), (340, 61765849), (470, 44681678), (799, 26283340), (940, 22340839), (1598, 13141670), (2209, 9506740), (3196, 6570835), (3995, 5256668), (4418, 4753370), (7990, 2628334), (8836, 2376685), (11045, 1901348), (15980, 1314167), (22090, 950674), (27961, 751060), (37553, 559220), (44180, 475337), (55922, 375530), (75106, 279610), (111844, 187765), (139805, 150212)]