19388920

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4447}}^1$

素因数の和:4567

約数の個数: 32

約数和(自身を含む): 44035200

約数和(自身を除く): 24646280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4447, 8894, 17788, 22235, 35576, 44470, 88940, 177880, 484723, 969446, 1938892, 2423615, 3877784, 4847230, 9694460, 19388920]

約数ペア:

[(1, 19388920), (2, 9694460), (4, 4847230), (5, 3877784), (8, 2423615), (10, 1938892), (20, 969446), (40, 484723), (109, 177880), (218, 88940), (436, 44470), (545, 35576), (872, 22235), (1090, 17788), (2180, 8894), (4360, 4447)]