21202517

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{1153}}^1$

素因数の和:1268

約数の個数: 16

約数和(自身を含む): 25258752

約数和(自身を除く): 4056235

約数列:

[1, 7, 37, 71, 259, 497, 1153, 2627, 8071, 18389, 42661, 81863, 298627, 573041, 3028931, 21202517]

約数ペア:

[(1, 21202517), (7, 3028931), (37, 573041), (71, 298627), (259, 81863), (497, 42661), (1153, 18389), (2627, 8071)]