81856000

素因数分解:

$2^9\times 5^3\times {\mathrm{1279}}^1$

素因数の和:1312

約数の個数: 80

約数和(自身を含む): 204272640

約数和(自身を除く): 122416640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 256, 320, 400, 500, 512, 640, 800, 1000, 1279, 1280, 1600, 2000, 2558, 2560, 3200, 4000, 5116, 6395, 6400, 8000, 10232, 12790, 12800, 16000, 20464, 25580, 31975, 32000, 40928, 51160, 63950, 64000, 81856, 102320, 127900, 159875, 163712, 204640, 255800, 319750, 327424, 409280, 511600, 639500, 654848, 818560, 1023200, 1279000, 1637120, 2046400, 2558000, 3274240, 4092800, 5116000, 8185600, 10232000, 16371200, 20464000, 40928000, 81856000]

約数ペア:

[(1, 81856000), (2, 40928000), (4, 20464000), (5, 16371200), (8, 10232000), (10, 8185600), (16, 5116000), (20, 4092800), (25, 3274240), (32, 2558000), (40, 2046400), (50, 1637120), (64, 1279000), (80, 1023200), (100, 818560), (125, 654848), (128, 639500), (160, 511600), (200, 409280), (250, 327424), (256, 319750), (320, 255800), (400, 204640), (500, 163712), (512, 159875), (640, 127900), (800, 102320), (1000, 81856), (1279, 64000), (1280, 63950), (1600, 51160), (2000, 40928), (2558, 32000), (2560, 31975), (3200, 25580), (4000, 20464), (5116, 16000), (6395, 12800), (6400, 12790), (8000, 10232)]