21003208

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{138179}}^1$

素因数の和:138204

約数の個数: 16

約数和(自身を含む): 41454000

約数和(自身を除く): 20450792

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 138179, 276358, 552716, 1105432, 2625401, 5250802, 10501604, 21003208]

約数ペア:

[(1, 21003208), (2, 10501604), (4, 5250802), (8, 2625401), (19, 1105432), (38, 552716), (76, 276358), (152, 138179)]