81271040

素因数分解:

$2^8\times 5^1\times {\mathrm{63493}}^1$

素因数の和:63514

約数の個数: 36

約数和(自身を含む): 194672604

約数和(自身を除く): 113401564

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 63493, 126986, 253972, 317465, 507944, 634930, 1015888, 1269860, 2031776, 2539720, 4063552, 5079440, 8127104, 10158880, 16254208, 20317760, 40635520, 81271040]

約数ペア:

[(1, 81271040), (2, 40635520), (4, 20317760), (5, 16254208), (8, 10158880), (10, 8127104), (16, 5079440), (20, 4063552), (32, 2539720), (40, 2031776), (64, 1269860), (80, 1015888), (128, 634930), (160, 507944), (256, 317465), (320, 253972), (640, 126986), (1280, 63493)]