21081216

素因数分解:

$2^7\times 3^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1$

素因数の和:174

約数の個数: 128

約数和(自身を含む): 62375040

約数和(自身を除く): 41293824

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 32, 39, 41, 48, 52, 64, 78, 82, 96, 103, 104, 123, 128, 156, 164, 192, 206, 208, 246, 309, 312, 328, 384, 412, 416, 492, 533, 618, 624, 656, 824, 832, 984, 1066, 1236, 1248, 1312, 1339, 1599, 1648, 1664, 1968, 2132, 2472, 2496, 2624, 2678, 3198, 3296, 3936, 4017, 4223, 4264, 4944, 4992, 5248, 5356, 6396, 6592, 7872, 8034, 8446, 8528, 9888, 10712, 12669, 12792, 13184, 15744, 16068, 16892, 17056, 19776, 21424, 25338, 25584, 32136, 33784, 34112, 39552, 42848, 50676, 51168, 54899, 64272, 67568, 68224, 85696, 101352, 102336, 109798, 128544, 135136, 164697, 171392, 202704, 204672, 219596, 257088, 270272, 329394, 405408, 439192, 514176, 540544, 658788, 810816, 878384, 1317576, 1621632, 1756768, 2635152, 3513536, 5270304, 7027072, 10540608, 21081216]

約数ペア:

[(1, 21081216), (2, 10540608), (3, 7027072), (4, 5270304), (6, 3513536), (8, 2635152), (12, 1756768), (13, 1621632), (16, 1317576), (24, 878384), (26, 810816), (32, 658788), (39, 540544), (41, 514176), (48, 439192), (52, 405408), (64, 329394), (78, 270272), (82, 257088), (96, 219596), (103, 204672), (104, 202704), (123, 171392), (128, 164697), (156, 135136), (164, 128544), (192, 109798), (206, 102336), (208, 101352), (246, 85696), (309, 68224), (312, 67568), (328, 64272), (384, 54899), (412, 51168), (416, 50676), (492, 42848), (533, 39552), (618, 34112), (624, 33784), (656, 32136), (824, 25584), (832, 25338), (984, 21424), (1066, 19776), (1236, 17056), (1248, 16892), (1312, 16068), (1339, 15744), (1599, 13184), (1648, 12792), (1664, 12669), (1968, 10712), (2132, 9888), (2472, 8528), (2496, 8446), (2624, 8034), (2678, 7872), (3198, 6592), (3296, 6396), (3936, 5356), (4017, 5248), (4223, 4992), (4264, 4944)]