21144320

素因数分解:

$2^8\times 5^1\times {\mathrm{16519}}^1$

素因数の和:16540

約数の個数: 36

約数和(自身を含む): 50650320

約数和(自身を除く): 29506000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 16519, 33038, 66076, 82595, 132152, 165190, 264304, 330380, 528608, 660760, 1057216, 1321520, 2114432, 2643040, 4228864, 5286080, 10572160, 21144320]

約数ペア:

[(1, 21144320), (2, 10572160), (4, 5286080), (5, 4228864), (8, 2643040), (10, 2114432), (16, 1321520), (20, 1057216), (32, 660760), (40, 528608), (64, 330380), (80, 264304), (128, 165190), (160, 132152), (256, 82595), (320, 66076), (640, 33038), (1280, 16519)]