19720017

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{14321}}^1$

素因数の和:14350

約数の個数: 20

約数和(自身を含む): 31193316

約数和(自身を除く): 11473299

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 14321, 42963, 128889, 243457, 386667, 730371, 1160001, 2191113, 6573339, 19720017]

約数ペア:

[(1, 19720017), (3, 6573339), (9, 2191113), (17, 1160001), (27, 730371), (51, 386667), (81, 243457), (153, 128889), (459, 42963), (1377, 14321)]