20928321

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{503}}^1$

素因数の和:602

約数の個数: 32

約数和(自身を含む): 32901120

約数和(自身を除く): 11972799

約数列:

[1, 3, 9, 23, 27, 67, 69, 201, 207, 503, 603, 621, 1509, 1541, 1809, 4527, 4623, 11569, 13581, 13869, 33701, 34707, 41607, 101103, 104121, 303309, 312363, 775123, 909927, 2325369, 6976107, 20928321]

約数ペア:

[(1, 20928321), (3, 6976107), (9, 2325369), (23, 909927), (27, 775123), (67, 312363), (69, 303309), (201, 104121), (207, 101103), (503, 41607), (603, 34707), (621, 33701), (1509, 13869), (1541, 13581), (1809, 11569), (4527, 4623)]