19999564

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{5417}}^1$

素因数の和:5505

約数の個数: 24

約数和(自身を含む): 38229408

約数和(自身を除く): 18229844

約数列:

[1, 2, 4, 13, 26, 52, 71, 142, 284, 923, 1846, 3692, 5417, 10834, 21668, 70421, 140842, 281684, 384607, 769214, 1538428, 4999891, 9999782, 19999564]

約数ペア:

[(1, 19999564), (2, 9999782), (4, 4999891), (13, 1538428), (26, 769214), (52, 384607), (71, 281684), (142, 140842), (284, 70421), (923, 21668), (1846, 10834), (3692, 5417)]