19999876

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{2767}}^1$

素因数の和:2923

約数の個数: 24

約数和(自身を含む): 37976960

約数和(自身を除く): 17977084

約数列:

[1, 2, 4, 13, 26, 52, 139, 278, 556, 1807, 2767, 3614, 5534, 7228, 11068, 35971, 71942, 143884, 384613, 769226, 1538452, 4999969, 9999938, 19999876]

約数ペア:

[(1, 19999876), (2, 9999938), (4, 4999969), (13, 1538452), (26, 769226), (52, 384613), (139, 143884), (278, 71942), (556, 35971), (1807, 11068), (2767, 7228), (3614, 5534)]