128898520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{74941}}^1$

素因数の和:74995

約数の個数: 32

約数和(自身を含む): 296770320

約数和(自身を除く): 167871800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 74941, 149882, 299764, 374705, 599528, 749410, 1498820, 2997640, 3222463, 6444926, 12889852, 16112315, 25779704, 32224630, 64449260, 128898520]

約数ペア:

[(1, 128898520), (2, 64449260), (4, 32224630), (5, 25779704), (8, 16112315), (10, 12889852), (20, 6444926), (40, 3222463), (43, 2997640), (86, 1498820), (172, 749410), (215, 599528), (344, 374705), (430, 299764), (860, 149882), (1720, 74941)]