21090551248

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{307}}^1\times {\mathrm{7681}}^1$

素因数の和:8052

約数の個数: 80

約数和(自身を含む): 45182205376

約数和(自身を除く): 24091654128

約数列:

[1, 2, 4, 8, 13, 16, 26, 43, 52, 86, 104, 172, 208, 307, 344, 559, 614, 688, 1118, 1228, 2236, 2456, 3991, 4472, 4912, 7681, 7982, 8944, 13201, 15362, 15964, 26402, 30724, 31928, 52804, 61448, 63856, 99853, 105608, 122896, 171613, 199706, 211216, 330283, 343226, 399412, 660566, 686452, 798824, 1321132, 1372904, 1597648, 2358067, 2642264, 2745808, 4293679, 4716134, 5284528, 8587358, 9432268, 17174716, 18864536, 30654871, 34349432, 37729072, 61309742, 68698864, 101396881, 122619484, 202793762, 245238968, 405587524, 490477936, 811175048, 1318159453, 1622350096, 2636318906, 5272637812, 10545275624, 21090551248]

約数ペア:

[(1, 21090551248), (2, 10545275624), (4, 5272637812), (8, 2636318906), (13, 1622350096), (16, 1318159453), (26, 811175048), (43, 490477936), (52, 405587524), (86, 245238968), (104, 202793762), (172, 122619484), (208, 101396881), (307, 68698864), (344, 61309742), (559, 37729072), (614, 34349432), (688, 30654871), (1118, 18864536), (1228, 17174716), (2236, 9432268), (2456, 8587358), (3991, 5284528), (4472, 4716134), (4912, 4293679), (7681, 2745808), (7982, 2642264), (8944, 2358067), (13201, 1597648), (15362, 1372904), (15964, 1321132), (26402, 798824), (30724, 686452), (31928, 660566), (52804, 399412), (61448, 343226), (63856, 330283), (99853, 211216), (105608, 199706), (122896, 171613)]