128538279

素因数分解:

$3^3\times {\mathrm{47}}^1\times {\mathrm{199}}^1\times {\mathrm{509}}^1$

素因数の和:764

約数の個数: 32

約数和(自身を含む): 195840000

約数和(自身を除く): 67301721

約数列:

[1, 3, 9, 27, 47, 141, 199, 423, 509, 597, 1269, 1527, 1791, 4581, 5373, 9353, 13743, 23923, 28059, 71769, 84177, 101291, 215307, 252531, 303873, 645921, 911619, 2734857, 4760677, 14282031, 42846093, 128538279]

約数ペア:

[(1, 128538279), (3, 42846093), (9, 14282031), (27, 4760677), (47, 2734857), (141, 911619), (199, 645921), (423, 303873), (509, 252531), (597, 215307), (1269, 101291), (1527, 84177), (1791, 71769), (4581, 28059), (5373, 23923), (9353, 13743)]