81400816

素因数分解:

$2^4\times 7^1\times {\mathrm{409}}^1\times {\mathrm{1777}}^1$

素因数の和:2201

約数の個数: 40

約数和(自身を含む): 180787040

約数和(自身を除く): 99386224

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 409, 818, 1636, 1777, 2863, 3272, 3554, 5726, 6544, 7108, 11452, 12439, 14216, 22904, 24878, 28432, 45808, 49756, 99512, 199024, 726793, 1453586, 2907172, 5087551, 5814344, 10175102, 11628688, 20350204, 40700408, 81400816]

約数ペア:

[(1, 81400816), (2, 40700408), (4, 20350204), (7, 11628688), (8, 10175102), (14, 5814344), (16, 5087551), (28, 2907172), (56, 1453586), (112, 726793), (409, 199024), (818, 99512), (1636, 49756), (1777, 45808), (2863, 28432), (3272, 24878), (3554, 22904), (5726, 14216), (6544, 12439), (7108, 11452)]