255221560

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{257}}^1$

素因数の和:377

約数の個数: 128

約数和(自身を含む): 656475840

約数和(自身を除く): 401254280

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 37, 40, 44, 55, 61, 74, 88, 110, 122, 148, 185, 220, 244, 257, 296, 305, 370, 407, 440, 488, 514, 610, 671, 740, 814, 1028, 1220, 1285, 1342, 1480, 1628, 2035, 2056, 2257, 2440, 2570, 2684, 2827, 3256, 3355, 4070, 4514, 5140, 5368, 5654, 6710, 8140, 9028, 9509, 10280, 11285, 11308, 13420, 14135, 15677, 16280, 18056, 19018, 22570, 22616, 24827, 26840, 28270, 31354, 38036, 45140, 47545, 49654, 56540, 62708, 76072, 78385, 90280, 95090, 99308, 104599, 113080, 124135, 125416, 156770, 172447, 190180, 198616, 209198, 248270, 313540, 344894, 380360, 418396, 496540, 522995, 580049, 627080, 689788, 836792, 862235, 993080, 1045990, 1160098, 1379576, 1724470, 2091980, 2320196, 2900245, 3448940, 4183960, 4640392, 5800490, 6380539, 6897880, 11600980, 12761078, 23201960, 25522156, 31902695, 51044312, 63805390, 127610780, 255221560]

約数ペア:

[(1, 255221560), (2, 127610780), (4, 63805390), (5, 51044312), (8, 31902695), (10, 25522156), (11, 23201960), (20, 12761078), (22, 11600980), (37, 6897880), (40, 6380539), (44, 5800490), (55, 4640392), (61, 4183960), (74, 3448940), (88, 2900245), (110, 2320196), (122, 2091980), (148, 1724470), (185, 1379576), (220, 1160098), (244, 1045990), (257, 993080), (296, 862235), (305, 836792), (370, 689788), (407, 627080), (440, 580049), (488, 522995), (514, 496540), (610, 418396), (671, 380360), (740, 344894), (814, 313540), (1028, 248270), (1220, 209198), (1285, 198616), (1342, 190180), (1480, 172447), (1628, 156770), (2035, 125416), (2056, 124135), (2257, 113080), (2440, 104599), (2570, 99308), (2684, 95090), (2827, 90280), (3256, 78385), (3355, 76072), (4070, 62708), (4514, 56540), (5140, 49654), (5368, 47545), (5654, 45140), (6710, 38036), (8140, 31354), (9028, 28270), (9509, 26840), (10280, 24827), (11285, 22616), (11308, 22570), (13420, 19018), (14135, 18056), (15677, 16280)]