688640

素因数分解:

$2^9\times 5^1\times {\mathrm{269}}^1$

素因数の和:292

約数の個数: 40

約数和(自身を含む): 1657260

約数和(自身を除く): 968620

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 269, 320, 512, 538, 640, 1076, 1280, 1345, 2152, 2560, 2690, 4304, 5380, 8608, 10760, 17216, 21520, 34432, 43040, 68864, 86080, 137728, 172160, 344320, 688640]

約数ペア:

[(1, 688640), (2, 344320), (4, 172160), (5, 137728), (8, 86080), (10, 68864), (16, 43040), (20, 34432), (32, 21520), (40, 17216), (64, 10760), (80, 8608), (128, 5380), (160, 4304), (256, 2690), (269, 2560), (320, 2152), (512, 1345), (538, 1280), (640, 1076)]