81990090

素因数分解:

$2^1\times 3^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:154

約数の個数: 256

約数和(自身を含む): 278691840

約数和(自身を除く): 196701750

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 13, 14, 15, 18, 21, 26, 27, 30, 35, 39, 42, 45, 47, 54, 63, 65, 70, 71, 78, 90, 91, 94, 105, 117, 126, 130, 135, 141, 142, 182, 189, 195, 210, 213, 234, 235, 270, 273, 282, 315, 329, 351, 355, 378, 390, 423, 426, 455, 470, 497, 546, 585, 611, 630, 639, 658, 702, 705, 710, 819, 846, 910, 923, 945, 987, 994, 1065, 1170, 1222, 1269, 1278, 1365, 1410, 1491, 1638, 1645, 1755, 1833, 1846, 1890, 1917, 1974, 2115, 2130, 2457, 2485, 2538, 2730, 2769, 2961, 2982, 3055, 3195, 3290, 3337, 3510, 3666, 3834, 4095, 4230, 4277, 4473, 4615, 4914, 4935, 4970, 5499, 5538, 5922, 6110, 6345, 6390, 6461, 6674, 7455, 8190, 8307, 8554, 8883, 8946, 9165, 9230, 9585, 9870, 10011, 10998, 12285, 12690, 12831, 12922, 13419, 13845, 14805, 14910, 16497, 16614, 16685, 17766, 18330, 19170, 19383, 20022, 21385, 22365, 23359, 24570, 24921, 25662, 26838, 27495, 27690, 29610, 30033, 32305, 32994, 33370, 38493, 38766, 41535, 42770, 43381, 44415, 44730, 46718, 49842, 50055, 54990, 58149, 60066, 64155, 64610, 67095, 70077, 76986, 82485, 83070, 86762, 88830, 90099, 96915, 100110, 115479, 116298, 116795, 124605, 128310, 130143, 134190, 140154, 150165, 164970, 174447, 180198, 192465, 193830, 210231, 216905, 230958, 233590, 249210, 260286, 290745, 300330, 303667, 348894, 350385, 384930, 390429, 420462, 433810, 450495, 577395, 581490, 607334, 630693, 650715, 700770, 780858, 872235, 900990, 911001, 1051155, 1154790, 1171287, 1261386, 1301430, 1518335, 1744470, 1822002, 1952145, 2102310, 2342574, 2733003, 3036670, 3153465, 3904290, 4555005, 5466006, 5856435, 6306930, 8199009, 9110010, 11712870, 13665015, 16398018, 27330030, 40995045, 81990090]

約数ペア:

[(1, 81990090), (2, 40995045), (3, 27330030), (5, 16398018), (6, 13665015), (7, 11712870), (9, 9110010), (10, 8199009), (13, 6306930), (14, 5856435), (15, 5466006), (18, 4555005), (21, 3904290), (26, 3153465), (27, 3036670), (30, 2733003), (35, 2342574), (39, 2102310), (42, 1952145), (45, 1822002), (47, 1744470), (54, 1518335), (63, 1301430), (65, 1261386), (70, 1171287), (71, 1154790), (78, 1051155), (90, 911001), (91, 900990), (94, 872235), (105, 780858), (117, 700770), (126, 650715), (130, 630693), (135, 607334), (141, 581490), (142, 577395), (182, 450495), (189, 433810), (195, 420462), (210, 390429), (213, 384930), (234, 350385), (235, 348894), (270, 303667), (273, 300330), (282, 290745), (315, 260286), (329, 249210), (351, 233590), (355, 230958), (378, 216905), (390, 210231), (423, 193830), (426, 192465), (455, 180198), (470, 174447), (497, 164970), (546, 150165), (585, 140154), (611, 134190), (630, 130143), (639, 128310), (658, 124605), (702, 116795), (705, 116298), (710, 115479), (819, 100110), (846, 96915), (910, 90099), (923, 88830), (945, 86762), (987, 83070), (994, 82485), (1065, 76986), (1170, 70077), (1222, 67095), (1269, 64610), (1278, 64155), (1365, 60066), (1410, 58149), (1491, 54990), (1638, 50055), (1645, 49842), (1755, 46718), (1833, 44730), (1846, 44415), (1890, 43381), (1917, 42770), (1974, 41535), (2115, 38766), (2130, 38493), (2457, 33370), (2485, 32994), (2538, 32305), (2730, 30033), (2769, 29610), (2961, 27690), (2982, 27495), (3055, 26838), (3195, 25662), (3290, 24921), (3337, 24570), (3510, 23359), (3666, 22365), (3834, 21385), (4095, 20022), (4230, 19383), (4277, 19170), (4473, 18330), (4615, 17766), (4914, 16685), (4935, 16614), (4970, 16497), (5499, 14910), (5538, 14805), (5922, 13845), (6110, 13419), (6345, 12922), (6390, 12831), (6461, 12690), (6674, 12285), (7455, 10998), (8190, 10011), (8307, 9870), (8554, 9585), (8883, 9230), (8946, 9165)]