20931440

素因数分解:

$2^4\times 5^1\times {\mathrm{261643}}^1$

素因数の和:261656

約数の個数: 20

約数和(自身を含む): 48665784

約数和(自身を除く): 27734344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 261643, 523286, 1046572, 1308215, 2093144, 2616430, 4186288, 5232860, 10465720, 20931440]

約数ペア:

[(1, 20931440), (2, 10465720), (4, 5232860), (5, 4186288), (8, 2616430), (10, 2093144), (16, 1308215), (20, 1046572), (40, 523286), (80, 261643)]