21099520

素因数分解:

$2^{10}\times 5^1\times {\mathrm{13}}^1\times {\mathrm{317}}^1$

素因数の和:355

約数の個数: 88

約数和(自身を含む): 54679464

約数和(自身を除く): 33579944

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 317, 320, 416, 512, 520, 634, 640, 832, 1024, 1040, 1268, 1280, 1585, 1664, 2080, 2536, 2560, 3170, 3328, 4121, 4160, 5072, 5120, 6340, 6656, 8242, 8320, 10144, 12680, 13312, 16484, 16640, 20288, 20605, 25360, 32968, 33280, 40576, 41210, 50720, 65936, 66560, 81152, 82420, 101440, 131872, 162304, 164840, 202880, 263744, 324608, 329680, 405760, 527488, 659360, 811520, 1054976, 1318720, 1623040, 2109952, 2637440, 4219904, 5274880, 10549760, 21099520]

約数ペア:

[(1, 21099520), (2, 10549760), (4, 5274880), (5, 4219904), (8, 2637440), (10, 2109952), (13, 1623040), (16, 1318720), (20, 1054976), (26, 811520), (32, 659360), (40, 527488), (52, 405760), (64, 329680), (65, 324608), (80, 263744), (104, 202880), (128, 164840), (130, 162304), (160, 131872), (208, 101440), (256, 82420), (260, 81152), (317, 66560), (320, 65936), (416, 50720), (512, 41210), (520, 40576), (634, 33280), (640, 32968), (832, 25360), (1024, 20605), (1040, 20288), (1268, 16640), (1280, 16484), (1585, 13312), (1664, 12680), (2080, 10144), (2536, 8320), (2560, 8242), (3170, 6656), (3328, 6340), (4121, 5120), (4160, 5072)]