21741520

素因数分解:

$2^4\times 5^1\times {\mathrm{271769}}^1$

素因数の和:271782

約数の個数: 20

約数和(自身を含む): 50549220

約数和(自身を除く): 28807700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271769, 543538, 1087076, 1358845, 2174152, 2717690, 4348304, 5435380, 10870760, 21741520]

約数ペア:

[(1, 21741520), (2, 10870760), (4, 5435380), (5, 4348304), (8, 2717690), (10, 2174152), (16, 1358845), (20, 1087076), (40, 543538), (80, 271769)]