81486220

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{37379}}^1$

素因数の和:37497

約数の個数: 24

約数和(自身を含む): 172695600

約数和(自身を除く): 91209380

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 37379, 74758, 149516, 186895, 373790, 747580, 4074311, 8148622, 16297244, 20371555, 40743110, 81486220]

約数ペア:

[(1, 81486220), (2, 40743110), (4, 20371555), (5, 16297244), (10, 8148622), (20, 4074311), (109, 747580), (218, 373790), (436, 186895), (545, 149516), (1090, 74758), (2180, 37379)]