21180861

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{463}}^1$

素因数の和:522

約数の個数: 48

約数和(自身を含む): 36481536

約数和(自身を除く): 15300675

約数列:

[1, 3, 9, 13, 17, 23, 39, 51, 69, 117, 153, 207, 221, 299, 391, 463, 663, 897, 1173, 1389, 1989, 2691, 3519, 4167, 5083, 6019, 7871, 10649, 15249, 18057, 23613, 31947, 45747, 54171, 70839, 95841, 102323, 138437, 181033, 306969, 415311, 543099, 920907, 1245933, 1629297, 2353429, 7060287, 21180861]

約数ペア:

[(1, 21180861), (3, 7060287), (9, 2353429), (13, 1629297), (17, 1245933), (23, 920907), (39, 543099), (51, 415311), (69, 306969), (117, 181033), (153, 138437), (207, 102323), (221, 95841), (299, 70839), (391, 54171), (463, 45747), (663, 31947), (897, 23613), (1173, 18057), (1389, 15249), (1989, 10649), (2691, 7871), (3519, 6019), (4167, 5083)]