257112856

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{331}}^1$

素因数の和:465

約数の個数: 128

約数和(自身を含む): 655925760

約数和(自身を除く): 398812904

約数列:

[1, 2, 4, 7, 8, 11, 13, 14, 22, 26, 28, 44, 52, 56, 77, 88, 91, 97, 104, 143, 154, 182, 194, 286, 308, 331, 364, 388, 572, 616, 662, 679, 728, 776, 1001, 1067, 1144, 1261, 1324, 1358, 2002, 2134, 2317, 2522, 2648, 2716, 3641, 4004, 4268, 4303, 4634, 5044, 5432, 7282, 7469, 8008, 8536, 8606, 8827, 9268, 10088, 13871, 14564, 14938, 17212, 17654, 18536, 25487, 27742, 29128, 29876, 30121, 32107, 34424, 35308, 47333, 50974, 55484, 59752, 60242, 64214, 70616, 94666, 97097, 101948, 110968, 120484, 128428, 189332, 194194, 203896, 224749, 240968, 256856, 331331, 353177, 378664, 388388, 417391, 449498, 662662, 706354, 776776, 834782, 898996, 1325324, 1412708, 1669564, 1797992, 2472239, 2650648, 2825416, 2921737, 3339128, 4591301, 4944478, 5843474, 9182602, 9888956, 11686948, 18365204, 19777912, 23373896, 32139107, 36730408, 64278214, 128556428, 257112856]

約数ペア:

[(1, 257112856), (2, 128556428), (4, 64278214), (7, 36730408), (8, 32139107), (11, 23373896), (13, 19777912), (14, 18365204), (22, 11686948), (26, 9888956), (28, 9182602), (44, 5843474), (52, 4944478), (56, 4591301), (77, 3339128), (88, 2921737), (91, 2825416), (97, 2650648), (104, 2472239), (143, 1797992), (154, 1669564), (182, 1412708), (194, 1325324), (286, 898996), (308, 834782), (331, 776776), (364, 706354), (388, 662662), (572, 449498), (616, 417391), (662, 388388), (679, 378664), (728, 353177), (776, 331331), (1001, 256856), (1067, 240968), (1144, 224749), (1261, 203896), (1324, 194194), (1358, 189332), (2002, 128428), (2134, 120484), (2317, 110968), (2522, 101948), (2648, 97097), (2716, 94666), (3641, 70616), (4004, 64214), (4268, 60242), (4303, 59752), (4634, 55484), (5044, 50974), (5432, 47333), (7282, 35308), (7469, 34424), (8008, 32107), (8536, 30121), (8606, 29876), (8827, 29128), (9268, 27742), (10088, 25487), (13871, 18536), (14564, 17654), (14938, 17212)]