19401305

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{313}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 30927744

約数和(自身を除く): 11526439

約数列:

[1, 5, 7, 11, 23, 35, 49, 55, 77, 115, 161, 245, 253, 313, 385, 539, 805, 1127, 1265, 1565, 1771, 2191, 2695, 3443, 5635, 7199, 8855, 10955, 12397, 15337, 17215, 24101, 35995, 50393, 61985, 76685, 79189, 120505, 168707, 251965, 352751, 395945, 554323, 843535, 1763755, 2771615, 3880261, 19401305]

約数ペア:

[(1, 19401305), (5, 3880261), (7, 2771615), (11, 1763755), (23, 843535), (35, 554323), (49, 395945), (55, 352751), (77, 251965), (115, 168707), (161, 120505), (245, 79189), (253, 76685), (313, 61985), (385, 50393), (539, 35995), (805, 24101), (1127, 17215), (1265, 15337), (1565, 12397), (1771, 10955), (2191, 8855), (2695, 7199), (3443, 5635)]