31381520

素因数分解:

$2^4\times 5^1\times {\mathrm{392269}}^1$

素因数の和:392282

約数の個数: 20

約数和(自身を含む): 72962220

約数和(自身を除く): 41580700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 392269, 784538, 1569076, 1961345, 3138152, 3922690, 6276304, 7845380, 15690760, 31381520]

約数ペア:

[(1, 31381520), (2, 15690760), (4, 7845380), (5, 6276304), (8, 3922690), (10, 3138152), (16, 1961345), (20, 1569076), (40, 784538), (80, 392269)]