81644000

素因数分解:

$2^5\times 5^3\times {\mathrm{20411}}^1$

素因数の和:20436

約数の個数: 48

約数和(自身を含む): 200609136

約数和(自身を除く): 118965136

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000, 20411, 40822, 81644, 102055, 163288, 204110, 326576, 408220, 510275, 653152, 816440, 1020550, 1632880, 2041100, 2551375, 3265760, 4082200, 5102750, 8164400, 10205500, 16328800, 20411000, 40822000, 81644000]

約数ペア:

[(1, 81644000), (2, 40822000), (4, 20411000), (5, 16328800), (8, 10205500), (10, 8164400), (16, 5102750), (20, 4082200), (25, 3265760), (32, 2551375), (40, 2041100), (50, 1632880), (80, 1020550), (100, 816440), (125, 653152), (160, 510275), (200, 408220), (250, 326576), (400, 204110), (500, 163288), (800, 102055), (1000, 81644), (2000, 40822), (4000, 20411)]