20577280

素因数分解:

$2^{10}\times 5^1\times {\mathrm{4019}}^1$

素因数の和:4044

約数の個数: 44

約数和(自身を含む): 49373640

約数和(自身を除く): 28796360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 4019, 5120, 8038, 16076, 20095, 32152, 40190, 64304, 80380, 128608, 160760, 257216, 321520, 514432, 643040, 1028864, 1286080, 2057728, 2572160, 4115456, 5144320, 10288640, 20577280]

約数ペア:

[(1, 20577280), (2, 10288640), (4, 5144320), (5, 4115456), (8, 2572160), (10, 2057728), (16, 1286080), (20, 1028864), (32, 643040), (40, 514432), (64, 321520), (80, 257216), (128, 160760), (160, 128608), (256, 80380), (320, 64304), (512, 40190), (640, 32152), (1024, 20095), (1280, 16076), (2560, 8038), (4019, 5120)]