19989585

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{641}}^1$

素因数の和:676

約数の個数: 80

約数和(自身を含む): 44744832

約数和(自身を除く): 24755247

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 27, 33, 35, 45, 55, 63, 77, 81, 99, 105, 135, 165, 189, 231, 297, 315, 385, 405, 495, 567, 641, 693, 891, 945, 1155, 1485, 1923, 2079, 2835, 3205, 3465, 4455, 4487, 5769, 6237, 7051, 9615, 10395, 13461, 17307, 21153, 22435, 28845, 31185, 35255, 40383, 49357, 51921, 63459, 67305, 86535, 105765, 121149, 148071, 190377, 201915, 246785, 259605, 317295, 363447, 444213, 571131, 605745, 740355, 951885, 1332639, 1817235, 2221065, 2855655, 3997917, 6663195, 19989585]

約数ペア:

[(1, 19989585), (3, 6663195), (5, 3997917), (7, 2855655), (9, 2221065), (11, 1817235), (15, 1332639), (21, 951885), (27, 740355), (33, 605745), (35, 571131), (45, 444213), (55, 363447), (63, 317295), (77, 259605), (81, 246785), (99, 201915), (105, 190377), (135, 148071), (165, 121149), (189, 105765), (231, 86535), (297, 67305), (315, 63459), (385, 51921), (405, 49357), (495, 40383), (567, 35255), (641, 31185), (693, 28845), (891, 22435), (945, 21153), (1155, 17307), (1485, 13461), (1923, 10395), (2079, 9615), (2835, 7051), (3205, 6237), (3465, 5769), (4455, 4487)]