20815805560

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{14177}}^1$

素因数の和:14317

約数の個数: 128

約数和(自身を含む): 52919101440

約数和(自身を除く): 32103295880

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 47, 55, 71, 88, 94, 110, 142, 188, 220, 235, 284, 355, 376, 440, 470, 517, 568, 710, 781, 940, 1034, 1420, 1562, 1880, 2068, 2585, 2840, 3124, 3337, 3905, 4136, 5170, 6248, 6674, 7810, 10340, 13348, 14177, 15620, 16685, 20680, 26696, 28354, 31240, 33370, 36707, 56708, 66740, 70885, 73414, 113416, 133480, 141770, 146828, 155947, 183535, 283540, 293656, 311894, 367070, 567080, 623788, 666319, 734140, 779735, 1006567, 1247576, 1332638, 1468280, 1559470, 2013134, 2665276, 3118940, 3331595, 4026268, 5032835, 5330552, 6237880, 6663190, 7329509, 8052536, 10065670, 11072237, 13326380, 14659018, 20131340, 22144474, 26652760, 29318036, 36647545, 40262680, 44288948, 47308649, 55361185, 58636072, 73295090, 88577896, 94617298, 110722370, 146590180, 189234596, 221444740, 236543245, 293180360, 378469192, 442889480, 473086490, 520395139, 946172980, 1040790278, 1892345960, 2081580556, 2601975695, 4163161112, 5203951390, 10407902780, 20815805560]

約数ペア:

[(1, 20815805560), (2, 10407902780), (4, 5203951390), (5, 4163161112), (8, 2601975695), (10, 2081580556), (11, 1892345960), (20, 1040790278), (22, 946172980), (40, 520395139), (44, 473086490), (47, 442889480), (55, 378469192), (71, 293180360), (88, 236543245), (94, 221444740), (110, 189234596), (142, 146590180), (188, 110722370), (220, 94617298), (235, 88577896), (284, 73295090), (355, 58636072), (376, 55361185), (440, 47308649), (470, 44288948), (517, 40262680), (568, 36647545), (710, 29318036), (781, 26652760), (940, 22144474), (1034, 20131340), (1420, 14659018), (1562, 13326380), (1880, 11072237), (2068, 10065670), (2585, 8052536), (2840, 7329509), (3124, 6663190), (3337, 6237880), (3905, 5330552), (4136, 5032835), (5170, 4026268), (6248, 3331595), (6674, 3118940), (7810, 2665276), (10340, 2013134), (13348, 1559470), (14177, 1468280), (15620, 1332638), (16685, 1247576), (20680, 1006567), (26696, 779735), (28354, 734140), (31240, 666319), (33370, 623788), (36707, 567080), (56708, 367070), (66740, 311894), (70885, 293656), (73414, 283540), (113416, 183535), (133480, 155947), (141770, 146828)]