21254728

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1$

素因数の和:238

約数の個数: 64

約数和(自身を含む): 45904320

約数和(自身を除く): 24649592

約数列:

[1, 2, 4, 8, 11, 22, 41, 43, 44, 82, 86, 88, 137, 164, 172, 274, 328, 344, 451, 473, 548, 902, 946, 1096, 1507, 1763, 1804, 1892, 3014, 3526, 3608, 3784, 5617, 5891, 6028, 7052, 11234, 11782, 12056, 14104, 19393, 22468, 23564, 38786, 44936, 47128, 61787, 64801, 77572, 123574, 129602, 155144, 241531, 247148, 259204, 483062, 494296, 518408, 966124, 1932248, 2656841, 5313682, 10627364, 21254728]

約数ペア:

[(1, 21254728), (2, 10627364), (4, 5313682), (8, 2656841), (11, 1932248), (22, 966124), (41, 518408), (43, 494296), (44, 483062), (82, 259204), (86, 247148), (88, 241531), (137, 155144), (164, 129602), (172, 123574), (274, 77572), (328, 64801), (344, 61787), (451, 47128), (473, 44936), (548, 38786), (902, 23564), (946, 22468), (1096, 19393), (1507, 14104), (1763, 12056), (1804, 11782), (1892, 11234), (3014, 7052), (3526, 6028), (3608, 5891), (3784, 5617)]