20981558128

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{257}}^1\times {\mathrm{76157}}^1$

素因数の和:76489

約数の個数: 40

約数和(自身を含む): 41419594512

約数和(自身を除く): 20438036384

約数列:

[1, 2, 4, 8, 16, 67, 134, 257, 268, 514, 536, 1028, 1072, 2056, 4112, 17219, 34438, 68876, 76157, 137752, 152314, 275504, 304628, 609256, 1218512, 5102519, 10205038, 19572349, 20410076, 39144698, 40820152, 78289396, 81640304, 156578792, 313157584, 1311347383, 2622694766, 5245389532, 10490779064, 20981558128]

約数ペア:

[(1, 20981558128), (2, 10490779064), (4, 5245389532), (8, 2622694766), (16, 1311347383), (67, 313157584), (134, 156578792), (257, 81640304), (268, 78289396), (514, 40820152), (536, 39144698), (1028, 20410076), (1072, 19572349), (2056, 10205038), (4112, 5102519), (17219, 1218512), (34438, 609256), (68876, 304628), (76157, 275504), (137752, 152314)]