261998520

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{191}}^1$

素因数の和:306

約数の個数: 256

約数和(自身を含む): 955514880

約数和(自身を除く): 693516360

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 23, 24, 28, 30, 35, 40, 42, 46, 56, 60, 69, 70, 71, 84, 92, 105, 115, 120, 138, 140, 142, 161, 168, 184, 191, 210, 213, 230, 276, 280, 284, 322, 345, 355, 382, 420, 426, 460, 483, 497, 552, 568, 573, 644, 690, 710, 764, 805, 840, 852, 920, 955, 966, 994, 1065, 1146, 1288, 1337, 1380, 1420, 1491, 1528, 1610, 1633, 1704, 1910, 1932, 1988, 2130, 2292, 2415, 2485, 2674, 2760, 2840, 2865, 2982, 3220, 3266, 3820, 3864, 3976, 4011, 4260, 4393, 4584, 4830, 4899, 4970, 5348, 5730, 5964, 6440, 6532, 6685, 7455, 7640, 8022, 8165, 8520, 8786, 9660, 9798, 9940, 10696, 11431, 11460, 11928, 13064, 13179, 13370, 13561, 14910, 16044, 16330, 17572, 19320, 19596, 19880, 20055, 21965, 22862, 22920, 24495, 26358, 26740, 27122, 29820, 30751, 32088, 32660, 34293, 35144, 39192, 40110, 40683, 43930, 45724, 48990, 52716, 53480, 54244, 57155, 59640, 61502, 65320, 65895, 67805, 68586, 80220, 81366, 87860, 91448, 92253, 94927, 97980, 105432, 108488, 114310, 123004, 131790, 135610, 137172, 153755, 160440, 162732, 171465, 175720, 184506, 189854, 195960, 203415, 228620, 246008, 263580, 271220, 274344, 284781, 307510, 311903, 325464, 342930, 369012, 379708, 406830, 457240, 461265, 474635, 527160, 542440, 569562, 615020, 623806, 685860, 738024, 759416, 813660, 922530, 935709, 949270, 1139124, 1230040, 1247612, 1371720, 1423905, 1559515, 1627320, 1845060, 1871418, 1898540, 2183321, 2278248, 2495224, 2847810, 3119030, 3690120, 3742836, 3797080, 4366642, 4678545, 5695620, 6238060, 6549963, 7485672, 8733284, 9357090, 10916605, 11391240, 12476120, 13099926, 17466568, 18714180, 21833210, 26199852, 32749815, 37428360, 43666420, 52399704, 65499630, 87332840, 130999260, 261998520]

約数ペア:

[(1, 261998520), (2, 130999260), (3, 87332840), (4, 65499630), (5, 52399704), (6, 43666420), (7, 37428360), (8, 32749815), (10, 26199852), (12, 21833210), (14, 18714180), (15, 17466568), (20, 13099926), (21, 12476120), (23, 11391240), (24, 10916605), (28, 9357090), (30, 8733284), (35, 7485672), (40, 6549963), (42, 6238060), (46, 5695620), (56, 4678545), (60, 4366642), (69, 3797080), (70, 3742836), (71, 3690120), (84, 3119030), (92, 2847810), (105, 2495224), (115, 2278248), (120, 2183321), (138, 1898540), (140, 1871418), (142, 1845060), (161, 1627320), (168, 1559515), (184, 1423905), (191, 1371720), (210, 1247612), (213, 1230040), (230, 1139124), (276, 949270), (280, 935709), (284, 922530), (322, 813660), (345, 759416), (355, 738024), (382, 685860), (420, 623806), (426, 615020), (460, 569562), (483, 542440), (497, 527160), (552, 474635), (568, 461265), (573, 457240), (644, 406830), (690, 379708), (710, 369012), (764, 342930), (805, 325464), (840, 311903), (852, 307510), (920, 284781), (955, 274344), (966, 271220), (994, 263580), (1065, 246008), (1146, 228620), (1288, 203415), (1337, 195960), (1380, 189854), (1420, 184506), (1491, 175720), (1528, 171465), (1610, 162732), (1633, 160440), (1704, 153755), (1910, 137172), (1932, 135610), (1988, 131790), (2130, 123004), (2292, 114310), (2415, 108488), (2485, 105432), (2674, 97980), (2760, 94927), (2840, 92253), (2865, 91448), (2982, 87860), (3220, 81366), (3266, 80220), (3820, 68586), (3864, 67805), (3976, 65895), (4011, 65320), (4260, 61502), (4393, 59640), (4584, 57155), (4830, 54244), (4899, 53480), (4970, 52716), (5348, 48990), (5730, 45724), (5964, 43930), (6440, 40683), (6532, 40110), (6685, 39192), (7455, 35144), (7640, 34293), (8022, 32660), (8165, 32088), (8520, 30751), (8786, 29820), (9660, 27122), (9798, 26740), (9940, 26358), (10696, 24495), (11431, 22920), (11460, 22862), (11928, 21965), (13064, 20055), (13179, 19880), (13370, 19596), (13561, 19320), (14910, 17572), (16044, 16330)]