205655121

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{1999}}^1$

素因数の和:2106

約数の個数: 48

約数和(自身を含む): 359424000

約数和(自身を除く): 153768879

約数列:

[1, 3, 7, 9, 21, 23, 63, 69, 71, 161, 207, 213, 483, 497, 639, 1449, 1491, 1633, 1999, 4473, 4899, 5997, 11431, 13993, 14697, 17991, 34293, 41979, 45977, 102879, 125937, 137931, 141929, 321839, 413793, 425787, 965517, 993503, 1277361, 2896551, 2980509, 3264367, 8941527, 9793101, 22850569, 29379303, 68551707, 205655121]

約数ペア:

[(1, 205655121), (3, 68551707), (7, 29379303), (9, 22850569), (21, 9793101), (23, 8941527), (63, 3264367), (69, 2980509), (71, 2896551), (161, 1277361), (207, 993503), (213, 965517), (483, 425787), (497, 413793), (639, 321839), (1449, 141929), (1491, 137931), (1633, 125937), (1999, 102879), (4473, 45977), (4899, 41979), (5997, 34293), (11431, 17991), (13993, 14697)]