289403720

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{66377}}^1$

素因数の和:66497

約数の個数: 32

約数和(自身を含む): 657142200

約数和(自身を除く): 367738480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 66377, 132754, 265508, 331885, 531016, 663770, 1327540, 2655080, 7235093, 14470186, 28940372, 36175465, 57880744, 72350930, 144701860, 289403720]

約数ペア:

[(1, 289403720), (2, 144701860), (4, 72350930), (5, 57880744), (8, 36175465), (10, 28940372), (20, 14470186), (40, 7235093), (109, 2655080), (218, 1327540), (436, 663770), (545, 531016), (872, 331885), (1090, 265508), (2180, 132754), (4360, 66377)]