21880280

素因数分解:

$2^3\times 5^1\times {\mathrm{547007}}^1$

素因数の和:547018

約数の個数: 16

約数和(自身を含む): 49230720

約数和(自身を除く): 27350440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 547007, 1094014, 2188028, 2735035, 4376056, 5470070, 10940140, 21880280]

約数ペア:

[(1, 21880280), (2, 10940140), (4, 5470070), (5, 4376056), (8, 2735035), (10, 2188028), (20, 1094014), (40, 547007)]