19999305

素因数分解:

$3^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{113}}^1$

素因数の和:172

約数の個数: 80

約数和(自身を含む): 39726720

約数和(自身を除く): 19727415

約数列:

[1, 3, 5, 9, 15, 19, 23, 27, 45, 57, 69, 81, 95, 113, 115, 135, 171, 207, 285, 339, 345, 405, 437, 513, 565, 621, 855, 1017, 1035, 1311, 1539, 1695, 1863, 2147, 2185, 2565, 2599, 3051, 3105, 3933, 5085, 6441, 6555, 7695, 7797, 9153, 9315, 10735, 11799, 12995, 15255, 19323, 19665, 23391, 32205, 35397, 38985, 45765, 49381, 57969, 58995, 70173, 96615, 116955, 148143, 173907, 176985, 210519, 246905, 289845, 350865, 444429, 740715, 869535, 1052595, 1333287, 2222145, 3999861, 6666435, 19999305]

約数ペア:

[(1, 19999305), (3, 6666435), (5, 3999861), (9, 2222145), (15, 1333287), (19, 1052595), (23, 869535), (27, 740715), (45, 444429), (57, 350865), (69, 289845), (81, 246905), (95, 210519), (113, 176985), (115, 173907), (135, 148143), (171, 116955), (207, 96615), (285, 70173), (339, 58995), (345, 57969), (405, 49381), (437, 45765), (513, 38985), (565, 35397), (621, 32205), (855, 23391), (1017, 19665), (1035, 19323), (1311, 15255), (1539, 12995), (1695, 11799), (1863, 10735), (2147, 9315), (2185, 9153), (2565, 7797), (2599, 7695), (3051, 6555), (3105, 6441), (3933, 5085)]