18247257

素因数分解:

$3^2\times 7^3\times {\mathrm{23}}^1\times {\mathrm{257}}^1$

素因数の和:307

約数の個数: 48

約数和(自身を含む): 32198400

約数和(自身を除く): 13951143

約数列:

[1, 3, 7, 9, 21, 23, 49, 63, 69, 147, 161, 207, 257, 343, 441, 483, 771, 1029, 1127, 1449, 1799, 2313, 3087, 3381, 5397, 5911, 7889, 10143, 12593, 16191, 17733, 23667, 37779, 41377, 53199, 71001, 88151, 113337, 124131, 264453, 289639, 372393, 793359, 868917, 2027473, 2606751, 6082419, 18247257]

約数ペア:

[(1, 18247257), (3, 6082419), (7, 2606751), (9, 2027473), (21, 868917), (23, 793359), (49, 372393), (63, 289639), (69, 264453), (147, 124131), (161, 113337), (207, 88151), (257, 71001), (343, 53199), (441, 41377), (483, 37779), (771, 23667), (1029, 17733), (1127, 16191), (1449, 12593), (1799, 10143), (2313, 7889), (3087, 5911), (3381, 5397)]