21823767

素因数分解:

$3^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:149

約数の個数: 72

約数和(自身を含む): 40334112

約数和(自身を除く): 18510345

約数列:

[1, 3, 7, 9, 17, 21, 41, 49, 51, 63, 71, 119, 123, 147, 153, 213, 287, 357, 369, 441, 497, 639, 697, 833, 861, 1071, 1207, 1491, 2009, 2091, 2499, 2583, 2911, 3479, 3621, 4473, 4879, 6027, 6273, 7497, 8449, 8733, 10437, 10863, 14637, 18081, 20377, 25347, 26199, 31311, 34153, 43911, 49487, 59143, 61131, 76041, 102459, 142639, 148461, 177429, 183393, 307377, 346409, 427917, 445383, 532287, 1039227, 1283751, 2424863, 3117681, 7274589, 21823767]

約数ペア:

[(1, 21823767), (3, 7274589), (7, 3117681), (9, 2424863), (17, 1283751), (21, 1039227), (41, 532287), (49, 445383), (51, 427917), (63, 346409), (71, 307377), (119, 183393), (123, 177429), (147, 148461), (153, 142639), (213, 102459), (287, 76041), (357, 61131), (369, 59143), (441, 49487), (497, 43911), (639, 34153), (697, 31311), (833, 26199), (861, 25347), (1071, 20377), (1207, 18081), (1491, 14637), (2009, 10863), (2091, 10437), (2499, 8733), (2583, 8449), (2911, 7497), (3479, 6273), (3621, 6027), (4473, 4879)]