19871764

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{6361}}^1$

素因数の和:6447

約数の個数: 24

約数和(自身を含む): 38477376

約数和(自身を除く): 18605612

約数列:

[1, 2, 4, 11, 22, 44, 71, 142, 284, 781, 1562, 3124, 6361, 12722, 25444, 69971, 139942, 279884, 451631, 903262, 1806524, 4967941, 9935882, 19871764]

約数ペア:

[(1, 19871764), (2, 9935882), (4, 4967941), (11, 1806524), (22, 903262), (44, 451631), (71, 279884), (142, 139942), (284, 69971), (781, 25444), (1562, 12722), (3124, 6361)]