20780452

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1$

素因数の和:161

約数の個数: 96

約数和(自身を含む): 49351680

約数和(自身を除く): 28571228

約数列:

[1, 2, 4, 7, 11, 14, 19, 22, 28, 38, 44, 53, 67, 76, 77, 106, 133, 134, 154, 209, 212, 266, 268, 308, 371, 418, 469, 532, 583, 737, 742, 836, 938, 1007, 1166, 1273, 1463, 1474, 1484, 1876, 2014, 2332, 2546, 2926, 2948, 3551, 4028, 4081, 5092, 5159, 5852, 7049, 7102, 8162, 8911, 10318, 11077, 14003, 14098, 14204, 16324, 17822, 20636, 22154, 24857, 28006, 28196, 35644, 39061, 44308, 49714, 56012, 67469, 77539, 78122, 98021, 99428, 134938, 155078, 156244, 196042, 269876, 273427, 310156, 392084, 472283, 546854, 742159, 944566, 1093708, 1484318, 1889132, 2968636, 5195113, 10390226, 20780452]

約数ペア:

[(1, 20780452), (2, 10390226), (4, 5195113), (7, 2968636), (11, 1889132), (14, 1484318), (19, 1093708), (22, 944566), (28, 742159), (38, 546854), (44, 472283), (53, 392084), (67, 310156), (76, 273427), (77, 269876), (106, 196042), (133, 156244), (134, 155078), (154, 134938), (209, 99428), (212, 98021), (266, 78122), (268, 77539), (308, 67469), (371, 56012), (418, 49714), (469, 44308), (532, 39061), (583, 35644), (737, 28196), (742, 28006), (836, 24857), (938, 22154), (1007, 20636), (1166, 17822), (1273, 16324), (1463, 14204), (1474, 14098), (1484, 14003), (1876, 11077), (2014, 10318), (2332, 8911), (2546, 8162), (2926, 7102), (2948, 7049), (3551, 5852), (4028, 5159), (4081, 5092)]