257040420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{263}}^1$

素因数の和:474

約数の個数: 192

約数和(自身を含む): 894136320

約数和(自身を除く): 637095900

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 20, 21, 26, 28, 30, 35, 39, 42, 52, 60, 65, 70, 78, 84, 91, 105, 130, 140, 156, 179, 182, 195, 210, 260, 263, 273, 358, 364, 390, 420, 455, 526, 537, 546, 716, 780, 789, 895, 910, 1052, 1074, 1092, 1253, 1315, 1365, 1578, 1790, 1820, 1841, 2148, 2327, 2506, 2630, 2685, 2730, 3156, 3419, 3580, 3682, 3759, 3945, 4654, 5012, 5260, 5370, 5460, 5523, 6265, 6838, 6981, 7364, 7518, 7890, 9205, 9308, 10257, 10740, 11046, 11635, 12530, 13676, 13962, 15036, 15780, 16289, 17095, 18410, 18795, 20514, 22092, 23270, 23933, 25060, 27615, 27924, 32578, 34190, 34905, 36820, 37590, 41028, 46540, 47077, 47866, 48867, 51285, 55230, 65156, 68380, 69810, 71799, 75180, 81445, 94154, 95732, 97734, 102570, 110460, 119665, 139620, 141231, 143598, 162890, 188308, 195468, 205140, 235385, 239330, 244335, 282462, 287196, 325780, 329539, 358995, 470770, 478660, 488670, 564924, 612001, 659078, 706155, 717990, 941540, 977340, 988617, 1224002, 1318156, 1412310, 1435980, 1647695, 1836003, 1977234, 2448004, 2824620, 3060005, 3295390, 3672006, 3954468, 4284007, 4943085, 6120010, 6590780, 7344012, 8568014, 9180015, 9886170, 12240020, 12852021, 17136028, 18360030, 19772340, 21420035, 25704042, 36720060, 42840070, 51408084, 64260105, 85680140, 128520210, 257040420]

約数ペア:

[(1, 257040420), (2, 128520210), (3, 85680140), (4, 64260105), (5, 51408084), (6, 42840070), (7, 36720060), (10, 25704042), (12, 21420035), (13, 19772340), (14, 18360030), (15, 17136028), (20, 12852021), (21, 12240020), (26, 9886170), (28, 9180015), (30, 8568014), (35, 7344012), (39, 6590780), (42, 6120010), (52, 4943085), (60, 4284007), (65, 3954468), (70, 3672006), (78, 3295390), (84, 3060005), (91, 2824620), (105, 2448004), (130, 1977234), (140, 1836003), (156, 1647695), (179, 1435980), (182, 1412310), (195, 1318156), (210, 1224002), (260, 988617), (263, 977340), (273, 941540), (358, 717990), (364, 706155), (390, 659078), (420, 612001), (455, 564924), (526, 488670), (537, 478660), (546, 470770), (716, 358995), (780, 329539), (789, 325780), (895, 287196), (910, 282462), (1052, 244335), (1074, 239330), (1092, 235385), (1253, 205140), (1315, 195468), (1365, 188308), (1578, 162890), (1790, 143598), (1820, 141231), (1841, 139620), (2148, 119665), (2327, 110460), (2506, 102570), (2630, 97734), (2685, 95732), (2730, 94154), (3156, 81445), (3419, 75180), (3580, 71799), (3682, 69810), (3759, 68380), (3945, 65156), (4654, 55230), (5012, 51285), (5260, 48867), (5370, 47866), (5460, 47077), (5523, 46540), (6265, 41028), (6838, 37590), (6981, 36820), (7364, 34905), (7518, 34190), (7890, 32578), (9205, 27924), (9308, 27615), (10257, 25060), (10740, 23933), (11046, 23270), (11635, 22092), (12530, 20514), (13676, 18795), (13962, 18410), (15036, 17095), (15780, 16289)]