81720320

素因数分解:

$2^{10}\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1451}}^1$

素因数の和:1487

約数の個数: 88

約数和(自身を含む): 214001568

約数和(自身を除く): 132281248

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 256, 320, 352, 440, 512, 640, 704, 880, 1024, 1280, 1408, 1451, 1760, 2560, 2816, 2902, 3520, 5120, 5632, 5804, 7040, 7255, 11264, 11608, 14080, 14510, 15961, 23216, 28160, 29020, 31922, 46432, 56320, 58040, 63844, 79805, 92864, 116080, 127688, 159610, 185728, 232160, 255376, 319220, 371456, 464320, 510752, 638440, 742912, 928640, 1021504, 1276880, 1485824, 1857280, 2043008, 2553760, 3714560, 4086016, 5107520, 7429120, 8172032, 10215040, 16344064, 20430080, 40860160, 81720320]

約数ペア:

[(1, 81720320), (2, 40860160), (4, 20430080), (5, 16344064), (8, 10215040), (10, 8172032), (11, 7429120), (16, 5107520), (20, 4086016), (22, 3714560), (32, 2553760), (40, 2043008), (44, 1857280), (55, 1485824), (64, 1276880), (80, 1021504), (88, 928640), (110, 742912), (128, 638440), (160, 510752), (176, 464320), (220, 371456), (256, 319220), (320, 255376), (352, 232160), (440, 185728), (512, 159610), (640, 127688), (704, 116080), (880, 92864), (1024, 79805), (1280, 63844), (1408, 58040), (1451, 56320), (1760, 46432), (2560, 31922), (2816, 29020), (2902, 28160), (3520, 23216), (5120, 15961), (5632, 14510), (5804, 14080), (7040, 11608), (7255, 11264)]