20706273

素因数分解:

$3^5\times 7^2\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:113

約数の個数: 72

約数和(自身を含む): 37844352

約数和(自身を除く): 17138079

約数列:

[1, 3, 7, 9, 21, 27, 37, 47, 49, 63, 81, 111, 141, 147, 189, 243, 259, 329, 333, 423, 441, 567, 777, 987, 999, 1269, 1323, 1701, 1739, 1813, 2303, 2331, 2961, 2997, 3807, 3969, 5217, 5439, 6909, 6993, 8883, 8991, 11421, 11907, 12173, 15651, 16317, 20727, 20979, 26649, 36519, 46953, 48951, 62181, 62937, 79947, 85211, 109557, 140859, 146853, 186543, 255633, 328671, 422577, 440559, 559629, 766899, 986013, 2300697, 2958039, 6902091, 20706273]

約数ペア:

[(1, 20706273), (3, 6902091), (7, 2958039), (9, 2300697), (21, 986013), (27, 766899), (37, 559629), (47, 440559), (49, 422577), (63, 328671), (81, 255633), (111, 186543), (141, 146853), (147, 140859), (189, 109557), (243, 85211), (259, 79947), (329, 62937), (333, 62181), (423, 48951), (441, 46953), (567, 36519), (777, 26649), (987, 20979), (999, 20727), (1269, 16317), (1323, 15651), (1701, 12173), (1739, 11907), (1813, 11421), (2303, 8991), (2331, 8883), (2961, 6993), (2997, 6909), (3807, 5439), (3969, 5217)]