81302680

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47269}}^1$

素因数の和:47323

約数の個数: 32

約数和(自身を含む): 187189200

約数和(自身を除く): 105886520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 47269, 94538, 189076, 236345, 378152, 472690, 945380, 1890760, 2032567, 4065134, 8130268, 10162835, 16260536, 20325670, 40651340, 81302680]

約数ペア:

[(1, 81302680), (2, 40651340), (4, 20325670), (5, 16260536), (8, 10162835), (10, 8130268), (20, 4065134), (40, 2032567), (43, 1890760), (86, 945380), (172, 472690), (215, 378152), (344, 236345), (430, 189076), (860, 94538), (1720, 47269)]