81264140

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{2707}}^1$

素因数の和:2814

約数の個数: 48

約数和(自身を含む): 181977600

約数和(自身を除く): 100713460

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 79, 95, 158, 190, 316, 380, 395, 790, 1501, 1580, 2707, 3002, 5414, 6004, 7505, 10828, 13535, 15010, 27070, 30020, 51433, 54140, 102866, 205732, 213853, 257165, 427706, 514330, 855412, 1028660, 1069265, 2138530, 4063207, 4277060, 8126414, 16252828, 20316035, 40632070, 81264140]

約数ペア:

[(1, 81264140), (2, 40632070), (4, 20316035), (5, 16252828), (10, 8126414), (19, 4277060), (20, 4063207), (38, 2138530), (76, 1069265), (79, 1028660), (95, 855412), (158, 514330), (190, 427706), (316, 257165), (380, 213853), (395, 205732), (790, 102866), (1501, 54140), (1580, 51433), (2707, 30020), (3002, 27070), (5414, 15010), (6004, 13535), (7505, 10828)]