21325437

素因数分解:

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

素因数の和:234

約数の個数: 48

約数和(自身を含む): 37392000

約数和(自身を除く): 16066563

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 199, 243, 441, 567, 597, 729, 1323, 1393, 1701, 1791, 2187, 3969, 4179, 5103, 5373, 9751, 11907, 12537, 15309, 16119, 29253, 35721, 37611, 48357, 87759, 107163, 112833, 145071, 263277, 338499, 435213, 789831, 1015497, 2369493, 3046491, 7108479, 21325437]

約数ペア:

[(1, 21325437), (3, 7108479), (7, 3046491), (9, 2369493), (21, 1015497), (27, 789831), (49, 435213), (63, 338499), (81, 263277), (147, 145071), (189, 112833), (199, 107163), (243, 87759), (441, 48357), (567, 37611), (597, 35721), (729, 29253), (1323, 16119), (1393, 15309), (1701, 12537), (1791, 11907), (2187, 9751), (3969, 5373), (4179, 5103)]