19990916

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{239}}^1\times {\mathrm{1901}}^1$

素因数の和:2155

約数の個数: 24

約数和(自身を含む): 38344320

約数和(自身を除く): 18353404

約数列:

[1, 2, 4, 11, 22, 44, 239, 478, 956, 1901, 2629, 3802, 5258, 7604, 10516, 20911, 41822, 83644, 454339, 908678, 1817356, 4997729, 9995458, 19990916]

約数ペア:

[(1, 19990916), (2, 9995458), (4, 4997729), (11, 1817356), (22, 908678), (44, 454339), (239, 83644), (478, 41822), (956, 20911), (1901, 10516), (2629, 7604), (3802, 5258)]