20798883

素因数分解:

$3^3\times 7^2\times {\mathrm{79}}^1\times {\mathrm{199}}^1$

素因数の和:301

約数の個数: 48

約数和(自身を含む): 36480000

約数和(自身を除く): 15681117

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 79, 147, 189, 199, 237, 441, 553, 597, 711, 1323, 1393, 1659, 1791, 2133, 3871, 4179, 4977, 5373, 9751, 11613, 12537, 14931, 15721, 29253, 34839, 37611, 47163, 87759, 104517, 110047, 141489, 263277, 330141, 424467, 770329, 990423, 2310987, 2971269, 6932961, 20798883]

約数ペア:

[(1, 20798883), (3, 6932961), (7, 2971269), (9, 2310987), (21, 990423), (27, 770329), (49, 424467), (63, 330141), (79, 263277), (147, 141489), (189, 110047), (199, 104517), (237, 87759), (441, 47163), (553, 37611), (597, 34839), (711, 29253), (1323, 15721), (1393, 14931), (1659, 12537), (1791, 11613), (2133, 9751), (3871, 5373), (4179, 4977)]