257917520

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{179}}^1$

素因数の和:313

約数の個数: 160

約数和(自身を含む): 719953920

約数和(自身を除く): 462036400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 35, 40, 56, 62, 70, 80, 83, 112, 124, 140, 155, 166, 179, 217, 248, 280, 310, 332, 358, 415, 434, 496, 560, 581, 620, 664, 716, 830, 868, 895, 1085, 1162, 1240, 1253, 1328, 1432, 1660, 1736, 1790, 2170, 2324, 2480, 2506, 2573, 2864, 2905, 3320, 3472, 3580, 4340, 4648, 5012, 5146, 5549, 5810, 6265, 6640, 7160, 8680, 9296, 10024, 10292, 11098, 11620, 12530, 12865, 14320, 14857, 17360, 18011, 20048, 20584, 22196, 23240, 25060, 25730, 27745, 29714, 36022, 38843, 41168, 44392, 46480, 50120, 51460, 55490, 59428, 72044, 74285, 77686, 88784, 90055, 100240, 102920, 103999, 110980, 118856, 144088, 148570, 155372, 180110, 194215, 205840, 207998, 221960, 237712, 288176, 297140, 310744, 360220, 388430, 415996, 443920, 460567, 519995, 594280, 621488, 720440, 776860, 831992, 921134, 1039990, 1188560, 1440880, 1553720, 1663984, 1842268, 2079980, 2302835, 3107440, 3223969, 3684536, 4159960, 4605670, 6447938, 7369072, 8319920, 9211340, 12895876, 16119845, 18422680, 25791752, 32239690, 36845360, 51583504, 64479380, 128958760, 257917520]

約数ペア:

[(1, 257917520), (2, 128958760), (4, 64479380), (5, 51583504), (7, 36845360), (8, 32239690), (10, 25791752), (14, 18422680), (16, 16119845), (20, 12895876), (28, 9211340), (31, 8319920), (35, 7369072), (40, 6447938), (56, 4605670), (62, 4159960), (70, 3684536), (80, 3223969), (83, 3107440), (112, 2302835), (124, 2079980), (140, 1842268), (155, 1663984), (166, 1553720), (179, 1440880), (217, 1188560), (248, 1039990), (280, 921134), (310, 831992), (332, 776860), (358, 720440), (415, 621488), (434, 594280), (496, 519995), (560, 460567), (581, 443920), (620, 415996), (664, 388430), (716, 360220), (830, 310744), (868, 297140), (895, 288176), (1085, 237712), (1162, 221960), (1240, 207998), (1253, 205840), (1328, 194215), (1432, 180110), (1660, 155372), (1736, 148570), (1790, 144088), (2170, 118856), (2324, 110980), (2480, 103999), (2506, 102920), (2573, 100240), (2864, 90055), (2905, 88784), (3320, 77686), (3472, 74285), (3580, 72044), (4340, 59428), (4648, 55490), (5012, 51460), (5146, 50120), (5549, 46480), (5810, 44392), (6265, 41168), (6640, 38843), (7160, 36022), (8680, 29714), (9296, 27745), (10024, 25730), (10292, 25060), (11098, 23240), (11620, 22196), (12530, 20584), (12865, 20048), (14320, 18011), (14857, 17360)]