128227720

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{74551}}^1$

素因数の和:74605

約数の個数: 32

約数和(自身を含む): 295225920

約数和(自身を除く): 166998200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 74551, 149102, 298204, 372755, 596408, 745510, 1491020, 2982040, 3205693, 6411386, 12822772, 16028465, 25645544, 32056930, 64113860, 128227720]

約数ペア:

[(1, 128227720), (2, 64113860), (4, 32056930), (5, 25645544), (8, 16028465), (10, 12822772), (20, 6411386), (40, 3205693), (43, 2982040), (86, 1491020), (172, 745510), (215, 596408), (344, 372755), (430, 298204), (860, 149102), (1720, 74551)]