21307919

素因数分解:

${\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{283}}^1$

素因数の和:446

約数の個数: 16

約数和(自身を含む): 23392512

約数和(自身を除く): 2084593

約数列:

[1, 17, 43, 103, 283, 731, 1751, 4429, 4811, 12169, 29149, 75293, 206873, 495533, 1253407, 21307919]

約数ペア:

[(1, 21307919), (17, 1253407), (43, 495533), (103, 206873), (283, 75293), (731, 29149), (1751, 12169), (4429, 4811)]