19561707

素因数分解:

$3^2\times {\mathrm{11}}^3\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:133

約数の個数: 48

約数和(自身を含む): 32887296

約数和(自身を除く): 13325589

約数列:

[1, 3, 9, 11, 23, 33, 69, 71, 99, 121, 207, 213, 253, 363, 639, 759, 781, 1089, 1331, 1633, 2277, 2343, 2783, 3993, 4899, 7029, 8349, 8591, 11979, 14697, 17963, 25047, 25773, 30613, 53889, 77319, 91839, 94501, 161667, 197593, 275517, 283503, 592779, 850509, 1778337, 2173523, 6520569, 19561707]

約数ペア:

[(1, 19561707), (3, 6520569), (9, 2173523), (11, 1778337), (23, 850509), (33, 592779), (69, 283503), (71, 275517), (99, 197593), (121, 161667), (207, 94501), (213, 91839), (253, 77319), (363, 53889), (639, 30613), (759, 25773), (781, 25047), (1089, 17963), (1331, 14697), (1633, 11979), (2277, 8591), (2343, 8349), (2783, 7029), (3993, 4899)]