21168640

素因数分解:

$2^9\times 5^1\times {\mathrm{8269}}^1$

素因数の和:8292

約数の個数: 40

約数和(自身を含む): 50761260

約数和(自身を除く): 29592620

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 8269, 16538, 33076, 41345, 66152, 82690, 132304, 165380, 264608, 330760, 529216, 661520, 1058432, 1323040, 2116864, 2646080, 4233728, 5292160, 10584320, 21168640]

約数ペア:

[(1, 21168640), (2, 10584320), (4, 5292160), (5, 4233728), (8, 2646080), (10, 2116864), (16, 1323040), (20, 1058432), (32, 661520), (40, 529216), (64, 330760), (80, 264608), (128, 165380), (160, 132304), (256, 82690), (320, 66152), (512, 41345), (640, 33076), (1280, 16538), (2560, 8269)]