257923120

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{499}}^1$

素因数の和:603

約数の個数: 160

約数和(自身を含む): 749952000

約数和(自身を除く): 492028880

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 52, 56, 65, 70, 71, 80, 91, 104, 112, 130, 140, 142, 182, 208, 260, 280, 284, 355, 364, 455, 497, 499, 520, 560, 568, 710, 728, 910, 923, 994, 998, 1040, 1136, 1420, 1456, 1820, 1846, 1988, 1996, 2485, 2495, 2840, 3493, 3640, 3692, 3976, 3992, 4615, 4970, 4990, 5680, 6461, 6487, 6986, 7280, 7384, 7952, 7984, 9230, 9940, 9980, 12922, 12974, 13972, 14768, 17465, 18460, 19880, 19960, 25844, 25948, 27944, 32305, 32435, 34930, 35429, 36920, 39760, 39920, 45409, 51688, 51896, 55888, 64610, 64870, 69860, 70858, 73840, 90818, 103376, 103792, 129220, 129740, 139720, 141716, 177145, 181636, 227045, 248003, 258440, 259480, 279440, 283432, 354290, 363272, 454090, 460577, 496006, 516880, 518960, 566864, 708580, 726544, 908180, 921154, 992012, 1240015, 1417160, 1816360, 1842308, 1984024, 2302885, 2480030, 2834320, 3224039, 3632720, 3684616, 3968048, 4605770, 4960060, 6448078, 7369232, 9211540, 9920120, 12896156, 16120195, 18423080, 19840240, 25792312, 32240390, 36846160, 51584624, 64480780, 128961560, 257923120]

約数ペア:

[(1, 257923120), (2, 128961560), (4, 64480780), (5, 51584624), (7, 36846160), (8, 32240390), (10, 25792312), (13, 19840240), (14, 18423080), (16, 16120195), (20, 12896156), (26, 9920120), (28, 9211540), (35, 7369232), (40, 6448078), (52, 4960060), (56, 4605770), (65, 3968048), (70, 3684616), (71, 3632720), (80, 3224039), (91, 2834320), (104, 2480030), (112, 2302885), (130, 1984024), (140, 1842308), (142, 1816360), (182, 1417160), (208, 1240015), (260, 992012), (280, 921154), (284, 908180), (355, 726544), (364, 708580), (455, 566864), (497, 518960), (499, 516880), (520, 496006), (560, 460577), (568, 454090), (710, 363272), (728, 354290), (910, 283432), (923, 279440), (994, 259480), (998, 258440), (1040, 248003), (1136, 227045), (1420, 181636), (1456, 177145), (1820, 141716), (1846, 139720), (1988, 129740), (1996, 129220), (2485, 103792), (2495, 103376), (2840, 90818), (3493, 73840), (3640, 70858), (3692, 69860), (3976, 64870), (3992, 64610), (4615, 55888), (4970, 51896), (4990, 51688), (5680, 45409), (6461, 39920), (6487, 39760), (6986, 36920), (7280, 35429), (7384, 34930), (7952, 32435), (7984, 32305), (9230, 27944), (9940, 25948), (9980, 25844), (12922, 19960), (12974, 19880), (13972, 18460), (14768, 17465)]