19993840

素因数分解:

$2^4\times 5^1\times {\mathrm{249923}}^1$

素因数の和:249936

約数の個数: 20

約数和(自身を含む): 46485864

約数和(自身を除く): 26492024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 249923, 499846, 999692, 1249615, 1999384, 2499230, 3998768, 4998460, 9996920, 19993840]

約数ペア:

[(1, 19993840), (2, 9996920), (4, 4998460), (5, 3998768), (8, 2499230), (10, 1999384), (16, 1249615), (20, 999692), (40, 499846), (80, 249923)]