21297857

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{173}}^1\times {\mathrm{409}}^1$

素因数の和:632

約数の個数: 16

約数和(自身を含む): 25111680

約数和(自身を除く): 3813823

約数列:

[1, 7, 43, 173, 301, 409, 1211, 2863, 7439, 17587, 52073, 70757, 123109, 495299, 3042551, 21297857]

約数ペア:

[(1, 21297857), (7, 3042551), (43, 495299), (173, 123109), (301, 70757), (409, 52073), (1211, 17587), (2863, 7439)]