20702787

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{57991}}^1$

素因数の和:58018

約数の個数: 16

約数和(自身を含む): 33403392

約数和(自身を除く): 12700605

約数列:

[1, 3, 7, 17, 21, 51, 119, 357, 57991, 173973, 405937, 985847, 1217811, 2957541, 6900929, 20702787]

約数ペア:

[(1, 20702787), (3, 6900929), (7, 2957541), (17, 1217811), (21, 985847), (51, 405937), (119, 173973), (357, 57991)]