20897760

素因数分解:

$2^5\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{197}}^1$

素因数の和:245

約数の個数: 192

約数和(自身を含む): 75442752

約数和(自身を除く): 54544992

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 17, 20, 24, 26, 30, 32, 34, 39, 40, 48, 51, 52, 60, 65, 68, 78, 80, 85, 96, 102, 104, 120, 130, 136, 156, 160, 170, 195, 197, 204, 208, 221, 240, 255, 260, 272, 312, 340, 390, 394, 408, 416, 442, 480, 510, 520, 544, 591, 624, 663, 680, 780, 788, 816, 884, 985, 1020, 1040, 1105, 1182, 1248, 1326, 1360, 1560, 1576, 1632, 1768, 1970, 2040, 2080, 2210, 2364, 2561, 2652, 2720, 2955, 3120, 3152, 3315, 3349, 3536, 3940, 4080, 4420, 4728, 5122, 5304, 5910, 6240, 6304, 6630, 6698, 7072, 7683, 7880, 8160, 8840, 9456, 10047, 10244, 10608, 11820, 12805, 13260, 13396, 15366, 15760, 16745, 17680, 18912, 20094, 20488, 21216, 23640, 25610, 26520, 26792, 30732, 31520, 33490, 35360, 38415, 40188, 40976, 43537, 47280, 50235, 51220, 53040, 53584, 61464, 66980, 76830, 80376, 81952, 87074, 94560, 100470, 102440, 106080, 107168, 122928, 130611, 133960, 153660, 160752, 174148, 200940, 204880, 217685, 245856, 261222, 267920, 307320, 321504, 348296, 401880, 409760, 435370, 522444, 535840, 614640, 653055, 696592, 803760, 870740, 1044888, 1229280, 1306110, 1393184, 1607520, 1741480, 2089776, 2612220, 3482960, 4179552, 5224440, 6965920, 10448880, 20897760]

約数ペア:

[(1, 20897760), (2, 10448880), (3, 6965920), (4, 5224440), (5, 4179552), (6, 3482960), (8, 2612220), (10, 2089776), (12, 1741480), (13, 1607520), (15, 1393184), (16, 1306110), (17, 1229280), (20, 1044888), (24, 870740), (26, 803760), (30, 696592), (32, 653055), (34, 614640), (39, 535840), (40, 522444), (48, 435370), (51, 409760), (52, 401880), (60, 348296), (65, 321504), (68, 307320), (78, 267920), (80, 261222), (85, 245856), (96, 217685), (102, 204880), (104, 200940), (120, 174148), (130, 160752), (136, 153660), (156, 133960), (160, 130611), (170, 122928), (195, 107168), (197, 106080), (204, 102440), (208, 100470), (221, 94560), (240, 87074), (255, 81952), (260, 80376), (272, 76830), (312, 66980), (340, 61464), (390, 53584), (394, 53040), (408, 51220), (416, 50235), (442, 47280), (480, 43537), (510, 40976), (520, 40188), (544, 38415), (591, 35360), (624, 33490), (663, 31520), (680, 30732), (780, 26792), (788, 26520), (816, 25610), (884, 23640), (985, 21216), (1020, 20488), (1040, 20094), (1105, 18912), (1182, 17680), (1248, 16745), (1326, 15760), (1360, 15366), (1560, 13396), (1576, 13260), (1632, 12805), (1768, 11820), (1970, 10608), (2040, 10244), (2080, 10047), (2210, 9456), (2364, 8840), (2561, 8160), (2652, 7880), (2720, 7683), (2955, 7072), (3120, 6698), (3152, 6630), (3315, 6304), (3349, 6240), (3536, 5910), (3940, 5304), (4080, 5122), (4420, 4728)]