20400051

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{57143}}^1$

素因数の和:57170

約数の個数: 16

約数和(自身を含む): 32914944

約数和(自身を除く): 12514893

約数列:

[1, 3, 7, 17, 21, 51, 119, 357, 57143, 171429, 400001, 971431, 1200003, 2914293, 6800017, 20400051]

約数ペア:

[(1, 20400051), (3, 6800017), (7, 2914293), (17, 1200003), (21, 971431), (51, 400001), (119, 171429), (357, 57143)]