20861295

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:105

約数の個数: 128

約数和(自身を含む): 46448640

約数和(自身を除く): 25587345

約数列:

[1, 3, 5, 7, 13, 15, 17, 21, 29, 31, 35, 39, 51, 65, 85, 87, 91, 93, 105, 119, 145, 155, 195, 203, 217, 221, 255, 273, 357, 377, 403, 435, 455, 465, 493, 527, 595, 609, 651, 663, 899, 1015, 1085, 1105, 1131, 1209, 1365, 1479, 1547, 1581, 1785, 1885, 2015, 2465, 2635, 2639, 2697, 2821, 3045, 3255, 3315, 3451, 3689, 4495, 4641, 5655, 6045, 6293, 6409, 6851, 7395, 7735, 7905, 7917, 8463, 10353, 11067, 11687, 13195, 13485, 14105, 15283, 17255, 18445, 18879, 19227, 20553, 23205, 31465, 32045, 34255, 35061, 39585, 42315, 44863, 45849, 47957, 51765, 55335, 58435, 76415, 81809, 94395, 96135, 102765, 106981, 134589, 143871, 175305, 198679, 224315, 229245, 239785, 245427, 320943, 409045, 534905, 596037, 672945, 719355, 993395, 1227135, 1390753, 1604715, 2980185, 4172259, 6953765, 20861295]

約数ペア:

[(1, 20861295), (3, 6953765), (5, 4172259), (7, 2980185), (13, 1604715), (15, 1390753), (17, 1227135), (21, 993395), (29, 719355), (31, 672945), (35, 596037), (39, 534905), (51, 409045), (65, 320943), (85, 245427), (87, 239785), (91, 229245), (93, 224315), (105, 198679), (119, 175305), (145, 143871), (155, 134589), (195, 106981), (203, 102765), (217, 96135), (221, 94395), (255, 81809), (273, 76415), (357, 58435), (377, 55335), (403, 51765), (435, 47957), (455, 45849), (465, 44863), (493, 42315), (527, 39585), (595, 35061), (609, 34255), (651, 32045), (663, 31465), (899, 23205), (1015, 20553), (1085, 19227), (1105, 18879), (1131, 18445), (1209, 17255), (1365, 15283), (1479, 14105), (1547, 13485), (1581, 13195), (1785, 11687), (1885, 11067), (2015, 10353), (2465, 8463), (2635, 7917), (2639, 7905), (2697, 7735), (2821, 7395), (3045, 6851), (3255, 6409), (3315, 6293), (3451, 6045), (3689, 5655), (4495, 4641)]