256921600

素因数分解:

$2^{12}\times 5^2\times {\mathrm{13}}^1\times {\mathrm{193}}^1$

素因数の和:240

約数の個数: 156

約数和(自身を含む): 689649436

約数和(自身を除く): 432727836

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 64, 65, 80, 100, 104, 128, 130, 160, 193, 200, 208, 256, 260, 320, 325, 386, 400, 416, 512, 520, 640, 650, 772, 800, 832, 965, 1024, 1040, 1280, 1300, 1544, 1600, 1664, 1930, 2048, 2080, 2509, 2560, 2600, 3088, 3200, 3328, 3860, 4096, 4160, 4825, 5018, 5120, 5200, 6176, 6400, 6656, 7720, 8320, 9650, 10036, 10240, 10400, 12352, 12545, 12800, 13312, 15440, 16640, 19300, 20072, 20480, 20800, 24704, 25090, 25600, 26624, 30880, 33280, 38600, 40144, 41600, 49408, 50180, 51200, 53248, 61760, 62725, 66560, 77200, 80288, 83200, 98816, 100360, 102400, 123520, 125450, 133120, 154400, 160576, 166400, 197632, 200720, 247040, 250900, 266240, 308800, 321152, 332800, 395264, 401440, 494080, 501800, 617600, 642304, 665600, 790528, 802880, 988160, 1003600, 1235200, 1284608, 1331200, 1605760, 1976320, 2007200, 2470400, 2569216, 3211520, 3952640, 4014400, 4940800, 5138432, 6423040, 8028800, 9881600, 10276864, 12846080, 16057600, 19763200, 25692160, 32115200, 51384320, 64230400, 128460800, 256921600]

約数ペア:

[(1, 256921600), (2, 128460800), (4, 64230400), (5, 51384320), (8, 32115200), (10, 25692160), (13, 19763200), (16, 16057600), (20, 12846080), (25, 10276864), (26, 9881600), (32, 8028800), (40, 6423040), (50, 5138432), (52, 4940800), (64, 4014400), (65, 3952640), (80, 3211520), (100, 2569216), (104, 2470400), (128, 2007200), (130, 1976320), (160, 1605760), (193, 1331200), (200, 1284608), (208, 1235200), (256, 1003600), (260, 988160), (320, 802880), (325, 790528), (386, 665600), (400, 642304), (416, 617600), (512, 501800), (520, 494080), (640, 401440), (650, 395264), (772, 332800), (800, 321152), (832, 308800), (965, 266240), (1024, 250900), (1040, 247040), (1280, 200720), (1300, 197632), (1544, 166400), (1600, 160576), (1664, 154400), (1930, 133120), (2048, 125450), (2080, 123520), (2509, 102400), (2560, 100360), (2600, 98816), (3088, 83200), (3200, 80288), (3328, 77200), (3860, 66560), (4096, 62725), (4160, 61760), (4825, 53248), (5018, 51200), (5120, 50180), (5200, 49408), (6176, 41600), (6400, 40144), (6656, 38600), (7720, 33280), (8320, 30880), (9650, 26624), (10036, 25600), (10240, 25090), (10400, 24704), (12352, 20800), (12545, 20480), (12800, 20072), (13312, 19300), (15440, 16640)]