20971998

素因数分解:

$2^1\times 3^2\times {\mathrm{23}}^1\times {\mathrm{179}}^1\times {\mathrm{283}}^1$

素因数の和:493

約数の個数: 48

約数和(自身を含む): 47848320

約数和(自身を除く): 26876322

約数列:

[1, 2, 3, 6, 9, 18, 23, 46, 69, 138, 179, 207, 283, 358, 414, 537, 566, 849, 1074, 1611, 1698, 2547, 3222, 4117, 5094, 6509, 8234, 12351, 13018, 19527, 24702, 37053, 39054, 50657, 58581, 74106, 101314, 117162, 151971, 303942, 455913, 911826, 1165111, 2330222, 3495333, 6990666, 10485999, 20971998]

約数ペア:

[(1, 20971998), (2, 10485999), (3, 6990666), (6, 3495333), (9, 2330222), (18, 1165111), (23, 911826), (46, 455913), (69, 303942), (138, 151971), (179, 117162), (207, 101314), (283, 74106), (358, 58581), (414, 50657), (537, 39054), (566, 37053), (849, 24702), (1074, 19527), (1611, 13018), (1698, 12351), (2547, 8234), (3222, 6509), (4117, 5094)]