823040

素因数分解:

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

素因数の和:664

約数の個数: 36

約数和(自身を含む): 1974504

約数和(自身を除く): 1151464

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 643, 1280, 1286, 2572, 3215, 5144, 6430, 10288, 12860, 20576, 25720, 41152, 51440, 82304, 102880, 164608, 205760, 411520, 823040]

約数ペア:

[(1, 823040), (2, 411520), (4, 205760), (5, 164608), (8, 102880), (10, 82304), (16, 51440), (20, 41152), (32, 25720), (40, 20576), (64, 12860), (80, 10288), (128, 6430), (160, 5144), (256, 3215), (320, 2572), (640, 1286), (643, 1280)]