20781658576

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{263941}}^1$

素因数の和:264012

約数の個数: 80

約数和(自身を含む): 49747788160

約数和(自身を除く): 28966129584

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 37, 38, 56, 74, 76, 112, 133, 148, 152, 259, 266, 296, 304, 518, 532, 592, 703, 1036, 1064, 1406, 2072, 2128, 2812, 4144, 4921, 5624, 9842, 11248, 19684, 39368, 78736, 263941, 527882, 1055764, 1847587, 2111528, 3695174, 4223056, 5014879, 7390348, 9765817, 10029758, 14780696, 19531634, 20059516, 29561392, 35104153, 39063268, 40119032, 68360719, 70208306, 78126536, 80238064, 136721438, 140416612, 156253072, 185550523, 273442876, 280833224, 371101046, 546885752, 561666448, 742202092, 1093771504, 1298853661, 1484404184, 2597707322, 2968808368, 5195414644, 10390829288, 20781658576]

約数ペア:

[(1, 20781658576), (2, 10390829288), (4, 5195414644), (7, 2968808368), (8, 2597707322), (14, 1484404184), (16, 1298853661), (19, 1093771504), (28, 742202092), (37, 561666448), (38, 546885752), (56, 371101046), (74, 280833224), (76, 273442876), (112, 185550523), (133, 156253072), (148, 140416612), (152, 136721438), (259, 80238064), (266, 78126536), (296, 70208306), (304, 68360719), (518, 40119032), (532, 39063268), (592, 35104153), (703, 29561392), (1036, 20059516), (1064, 19531634), (1406, 14780696), (2072, 10029758), (2128, 9765817), (2812, 7390348), (4144, 5014879), (4921, 4223056), (5624, 3695174), (9842, 2111528), (11248, 1847587), (19684, 1055764), (39368, 527882), (78736, 263941)]