20576000

素因数分解:

$2^8\times 5^3\times {\mathrm{643}}^1$

素因数の和:674

約数の個数: 72

約数和(自身を含む): 51337104

約数和(自身を除く): 30761104

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 256, 320, 400, 500, 640, 643, 800, 1000, 1280, 1286, 1600, 2000, 2572, 3200, 3215, 4000, 5144, 6400, 6430, 8000, 10288, 12860, 16000, 16075, 20576, 25720, 32000, 32150, 41152, 51440, 64300, 80375, 82304, 102880, 128600, 160750, 164608, 205760, 257200, 321500, 411520, 514400, 643000, 823040, 1028800, 1286000, 2057600, 2572000, 4115200, 5144000, 10288000, 20576000]

約数ペア:

[(1, 20576000), (2, 10288000), (4, 5144000), (5, 4115200), (8, 2572000), (10, 2057600), (16, 1286000), (20, 1028800), (25, 823040), (32, 643000), (40, 514400), (50, 411520), (64, 321500), (80, 257200), (100, 205760), (125, 164608), (128, 160750), (160, 128600), (200, 102880), (250, 82304), (256, 80375), (320, 64300), (400, 51440), (500, 41152), (640, 32150), (643, 32000), (800, 25720), (1000, 20576), (1280, 16075), (1286, 16000), (1600, 12860), (2000, 10288), (2572, 8000), (3200, 6430), (3215, 6400), (4000, 5144)]