208520631

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1$

素因数の和:205

約数の個数: 72

約数和(自身を含む): 349036688

約数和(自身を除く): 140516057

約数列:

[1, 3, 9, 11, 33, 43, 61, 73, 99, 121, 129, 183, 219, 363, 387, 473, 549, 657, 671, 803, 1089, 1419, 2013, 2409, 2623, 3139, 4257, 4453, 5203, 6039, 7227, 7381, 7869, 8833, 9417, 13359, 15609, 22143, 23607, 26499, 28251, 28853, 34529, 40077, 46827, 48983, 66429, 79497, 86559, 103587, 146949, 191479, 259677, 310761, 317383, 379819, 440847, 538813, 574437, 952149, 1139457, 1616439, 1723311, 2106269, 2856447, 3418371, 4849317, 6318807, 18956421, 23168959, 69506877, 208520631]

約数ペア:

[(1, 208520631), (3, 69506877), (9, 23168959), (11, 18956421), (33, 6318807), (43, 4849317), (61, 3418371), (73, 2856447), (99, 2106269), (121, 1723311), (129, 1616439), (183, 1139457), (219, 952149), (363, 574437), (387, 538813), (473, 440847), (549, 379819), (657, 317383), (671, 310761), (803, 259677), (1089, 191479), (1419, 146949), (2013, 103587), (2409, 86559), (2623, 79497), (3139, 66429), (4257, 48983), (4453, 46827), (5203, 40077), (6039, 34529), (7227, 28853), (7381, 28251), (7869, 26499), (8833, 23607), (9417, 22143), (13359, 15609)]