21280287

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{421}}^1$

素因数の和:543

約数の個数: 32

約数和(自身を含む): 34030080

約数和(自身を除く): 12749793

約数列:

[1, 3, 7, 21, 29, 83, 87, 203, 249, 421, 581, 609, 1263, 1743, 2407, 2947, 7221, 8841, 12209, 16849, 34943, 36627, 50547, 85463, 104829, 244601, 256389, 733803, 1013347, 3040041, 7093429, 21280287]

約数ペア:

[(1, 21280287), (3, 7093429), (7, 3040041), (21, 1013347), (29, 733803), (83, 256389), (87, 244601), (203, 104829), (249, 85463), (421, 50547), (581, 36627), (609, 34943), (1263, 16849), (1743, 12209), (2407, 8841), (2947, 7221)]