28657517

素因数分解:

$7^1\times {\mathrm{23}}^2\times {\mathrm{71}}^1\times {\mathrm{109}}^1$

素因数の和:233

約数の個数: 24

約数和(自身を含む): 35038080

約数和(自身を除く): 6380563

約数列:

[1, 7, 23, 71, 109, 161, 497, 529, 763, 1633, 2507, 3703, 7739, 11431, 17549, 37559, 54173, 57661, 177997, 262913, 403627, 1245979, 4093931, 28657517]

約数ペア:

[(1, 28657517), (7, 4093931), (23, 1245979), (71, 403627), (109, 262913), (161, 177997), (497, 57661), (529, 54173), (763, 37559), (1633, 17549), (2507, 11431), (3703, 7739)]