19009991

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{2713}}^1$

素因数の和:2751

約数の個数: 24

約数和(自身を含む): 25989264

約数和(自身を除く): 6979273

約数列:

[1, 7, 11, 13, 49, 77, 91, 143, 539, 637, 1001, 2713, 7007, 18991, 29843, 35269, 132937, 208901, 246883, 387959, 1462307, 1728181, 2715713, 19009991]

約数ペア:

[(1, 19009991), (7, 2715713), (11, 1728181), (13, 1462307), (49, 387959), (77, 246883), (91, 208901), (143, 132937), (539, 35269), (637, 29843), (1001, 18991), (2713, 7007)]