18915849

素因数分解:

$3^5\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{241}}^1$

素因数の和:292

約数の個数: 48

約数和(自身を含む): 31711680

約数和(自身を除く): 12795831

約数列:

[1, 3, 9, 17, 19, 27, 51, 57, 81, 153, 171, 241, 243, 323, 459, 513, 723, 969, 1377, 1539, 2169, 2907, 4097, 4131, 4579, 4617, 6507, 8721, 12291, 13737, 19521, 26163, 36873, 41211, 58563, 77843, 78489, 110619, 123633, 233529, 331857, 370899, 700587, 995571, 1112697, 2101761, 6305283, 18915849]

約数ペア:

[(1, 18915849), (3, 6305283), (9, 2101761), (17, 1112697), (19, 995571), (27, 700587), (51, 370899), (57, 331857), (81, 233529), (153, 123633), (171, 110619), (241, 78489), (243, 77843), (323, 58563), (459, 41211), (513, 36873), (723, 26163), (969, 19521), (1377, 13737), (1539, 12291), (2169, 8721), (2907, 6507), (4097, 4617), (4131, 4579)]