18821397

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{52721}}^1$

素因数の和:52748

約数の個数: 16

約数和(自身を含む): 30367872

約数和(自身を除く): 11546475

約数列:

[1, 3, 7, 17, 21, 51, 119, 357, 52721, 158163, 369047, 896257, 1107141, 2688771, 6273799, 18821397]

約数ペア:

[(1, 18821397), (3, 6273799), (7, 2688771), (17, 1107141), (21, 896257), (51, 369047), (119, 158163), (357, 52721)]