19968985

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{709}}^1$

素因数の和:888

約数の個数: 16

約数和(自身を含む): 24742080

約数和(自身を除く): 4773095

約数列:

[1, 5, 43, 131, 215, 655, 709, 3545, 5633, 28165, 30487, 92879, 152435, 464395, 3993797, 19968985]

約数ペア:

[(1, 19968985), (5, 3993797), (43, 464395), (131, 152435), (215, 92879), (655, 30487), (709, 28165), (3545, 5633)]