21204399

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{7019}}^1$

素因数の和:7094

約数の個数: 16

約数和(自身を含む): 30326400

約数和(自身を除く): 9122001

約数列:

[1, 3, 19, 53, 57, 159, 1007, 3021, 7019, 21057, 133361, 372007, 400083, 1116021, 7068133, 21204399]

約数ペア:

[(1, 21204399), (3, 7068133), (19, 1116021), (53, 400083), (57, 372007), (159, 133361), (1007, 21057), (3021, 7019)]