81196040

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47207}}^1$

素因数の和:47261

約数の個数: 32

約数和(自身を含む): 186943680

約数和(自身を除く): 105747640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 47207, 94414, 188828, 236035, 377656, 472070, 944140, 1888280, 2029901, 4059802, 8119604, 10149505, 16239208, 20299010, 40598020, 81196040]

約数ペア:

[(1, 81196040), (2, 40598020), (4, 20299010), (5, 16239208), (8, 10149505), (10, 8119604), (20, 4059802), (40, 2029901), (43, 1888280), (86, 944140), (172, 472070), (215, 377656), (344, 236035), (430, 188828), (860, 94414), (1720, 47207)]