19811547

素因数分解:

$3^5\times 7^1\times {\mathrm{19}}^1\times {\mathrm{613}}^1$

素因数の和:654

約数の個数: 48

約数和(自身を含む): 35759360

約数和(自身を除く): 15947813

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 81, 133, 171, 189, 243, 399, 513, 567, 613, 1197, 1539, 1701, 1839, 3591, 4291, 4617, 5517, 10773, 11647, 12873, 16551, 32319, 34941, 38619, 49653, 81529, 104823, 115857, 148959, 244587, 314469, 347571, 733761, 943407, 1042713, 2201283, 2830221, 6603849, 19811547]

約数ペア:

[(1, 19811547), (3, 6603849), (7, 2830221), (9, 2201283), (19, 1042713), (21, 943407), (27, 733761), (57, 347571), (63, 314469), (81, 244587), (133, 148959), (171, 115857), (189, 104823), (243, 81529), (399, 49653), (513, 38619), (567, 34941), (613, 32319), (1197, 16551), (1539, 12873), (1701, 11647), (1839, 10773), (3591, 5517), (4291, 4617)]