19701680

素因数分解:

$2^4\times 5^1\times {\mathrm{246271}}^1$

素因数の和:246284

約数の個数: 20

約数和(自身を含む): 45806592

約数和(自身を除く): 26104912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 246271, 492542, 985084, 1231355, 1970168, 2462710, 3940336, 4925420, 9850840, 19701680]

約数ペア:

[(1, 19701680), (2, 9850840), (4, 4925420), (5, 3940336), (8, 2462710), (10, 1970168), (16, 1231355), (20, 985084), (40, 492542), (80, 246271)]