81721600

素因数分解:

$2^8\times 5^2\times {\mathrm{113}}^2$

素因数の和:252

約数の個数: 81

約数和(自身を含む): 204079603

約数和(自身を除く): 122358003

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 113, 128, 160, 200, 226, 256, 320, 400, 452, 565, 640, 800, 904, 1130, 1280, 1600, 1808, 2260, 2825, 3200, 3616, 4520, 5650, 6400, 7232, 9040, 11300, 12769, 14464, 18080, 22600, 25538, 28928, 36160, 45200, 51076, 63845, 72320, 90400, 102152, 127690, 144640, 180800, 204304, 255380, 319225, 361600, 408608, 510760, 638450, 723200, 817216, 1021520, 1276900, 1634432, 2043040, 2553800, 3268864, 4086080, 5107600, 8172160, 10215200, 16344320, 20430400, 40860800, 81721600]

約数ペア:

[(1, 81721600), (2, 40860800), (4, 20430400), (5, 16344320), (8, 10215200), (10, 8172160), (16, 5107600), (20, 4086080), (25, 3268864), (32, 2553800), (40, 2043040), (50, 1634432), (64, 1276900), (80, 1021520), (100, 817216), (113, 723200), (128, 638450), (160, 510760), (200, 408608), (226, 361600), (256, 319225), (320, 255380), (400, 204304), (452, 180800), (565, 144640), (640, 127690), (800, 102152), (904, 90400), (1130, 72320), (1280, 63845), (1600, 51076), (1808, 45200), (2260, 36160), (2825, 28928), (3200, 25538), (3616, 22600), (4520, 18080), (5650, 14464), (6400, 12769), (7232, 11300)]