21945304

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{353}}^1\times {\mathrm{409}}^1$

素因数の和:787

約数の個数: 32

約数和(自身を含む): 43542000

約数和(自身を除く): 21596696

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 353, 409, 706, 818, 1412, 1636, 2824, 3272, 6707, 7771, 13414, 15542, 26828, 31084, 53656, 62168, 144377, 288754, 577508, 1155016, 2743163, 5486326, 10972652, 21945304]

約数ペア:

[(1, 21945304), (2, 10972652), (4, 5486326), (8, 2743163), (19, 1155016), (38, 577508), (76, 288754), (152, 144377), (353, 62168), (409, 53656), (706, 31084), (818, 26828), (1412, 15542), (1636, 13414), (2824, 7771), (3272, 6707)]