20555920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:149

約数の個数: 160

約数和(自身を含む): 61710336

約数和(自身を除く): 41154416

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 40, 44, 47, 55, 56, 70, 71, 77, 80, 88, 94, 110, 112, 140, 142, 154, 176, 188, 220, 235, 280, 284, 308, 329, 355, 376, 385, 440, 470, 497, 517, 560, 568, 616, 658, 710, 752, 770, 781, 880, 940, 994, 1034, 1136, 1232, 1316, 1420, 1540, 1562, 1645, 1880, 1988, 2068, 2485, 2585, 2632, 2840, 3080, 3124, 3290, 3337, 3619, 3760, 3905, 3976, 4136, 4970, 5170, 5264, 5467, 5680, 6160, 6248, 6580, 6674, 7238, 7810, 7952, 8272, 9940, 10340, 10934, 12496, 13160, 13348, 14476, 15620, 16685, 18095, 19880, 20680, 21868, 23359, 26320, 26696, 27335, 28952, 31240, 33370, 36190, 36707, 39760, 41360, 43736, 46718, 53392, 54670, 57904, 62480, 66740, 72380, 73414, 87472, 93436, 109340, 116795, 133480, 144760, 146828, 183535, 186872, 218680, 233590, 256949, 266960, 289520, 293656, 367070, 373744, 437360, 467180, 513898, 587312, 734140, 934360, 1027796, 1284745, 1468280, 1868720, 2055592, 2569490, 2936560, 4111184, 5138980, 10277960, 20555920]

約数ペア:

[(1, 20555920), (2, 10277960), (4, 5138980), (5, 4111184), (7, 2936560), (8, 2569490), (10, 2055592), (11, 1868720), (14, 1468280), (16, 1284745), (20, 1027796), (22, 934360), (28, 734140), (35, 587312), (40, 513898), (44, 467180), (47, 437360), (55, 373744), (56, 367070), (70, 293656), (71, 289520), (77, 266960), (80, 256949), (88, 233590), (94, 218680), (110, 186872), (112, 183535), (140, 146828), (142, 144760), (154, 133480), (176, 116795), (188, 109340), (220, 93436), (235, 87472), (280, 73414), (284, 72380), (308, 66740), (329, 62480), (355, 57904), (376, 54670), (385, 53392), (440, 46718), (470, 43736), (497, 41360), (517, 39760), (560, 36707), (568, 36190), (616, 33370), (658, 31240), (710, 28952), (752, 27335), (770, 26696), (781, 26320), (880, 23359), (940, 21868), (994, 20680), (1034, 19880), (1136, 18095), (1232, 16685), (1316, 15620), (1420, 14476), (1540, 13348), (1562, 13160), (1645, 12496), (1880, 10934), (1988, 10340), (2068, 9940), (2485, 8272), (2585, 7952), (2632, 7810), (2840, 7238), (3080, 6674), (3124, 6580), (3290, 6248), (3337, 6160), (3619, 5680), (3760, 5467), (3905, 5264), (3976, 5170), (4136, 4970)]