209905857

素因数分解:

$3^3\times 7^2\times {\mathrm{29}}^1\times {\mathrm{5471}}^1$

素因数の和:5523

約数の個数: 48

約数和(自身を含む): 374284800

約数和(自身を除く): 164378943

約数列:

[1, 3, 7, 9, 21, 27, 29, 49, 63, 87, 147, 189, 203, 261, 441, 609, 783, 1323, 1421, 1827, 4263, 5471, 5481, 12789, 16413, 38297, 38367, 49239, 114891, 147717, 158659, 268079, 344673, 475977, 804237, 1034019, 1110613, 1427931, 2412711, 3331839, 4283793, 7238133, 7774291, 9995517, 23322873, 29986551, 69968619, 209905857]

約数ペア:

[(1, 209905857), (3, 69968619), (7, 29986551), (9, 23322873), (21, 9995517), (27, 7774291), (29, 7238133), (49, 4283793), (63, 3331839), (87, 2412711), (147, 1427931), (189, 1110613), (203, 1034019), (261, 804237), (441, 475977), (609, 344673), (783, 268079), (1323, 158659), (1421, 147717), (1827, 114891), (4263, 49239), (5471, 38367), (5481, 38297), (12789, 16413)]