257305828

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^2\times {\mathrm{271}}^1$

素因数の和:369

約数の個数: 72

約数和(自身を含む): 529388160

約数和(自身を除く): 272082332

約数列:

[1, 2, 4, 13, 19, 26, 31, 38, 52, 62, 76, 124, 247, 271, 403, 494, 542, 589, 806, 961, 988, 1084, 1178, 1612, 1922, 2356, 3523, 3844, 5149, 7046, 7657, 8401, 10298, 12493, 14092, 15314, 16802, 18259, 20596, 24986, 30628, 33604, 36518, 49972, 66937, 73036, 109213, 133874, 159619, 218426, 237367, 260431, 267748, 319238, 436852, 474734, 520862, 638476, 949468, 1041724, 2075047, 3385603, 4150094, 4948189, 6771206, 8300188, 9896378, 13542412, 19792756, 64326457, 128652914, 257305828]

約数ペア:

[(1, 257305828), (2, 128652914), (4, 64326457), (13, 19792756), (19, 13542412), (26, 9896378), (31, 8300188), (38, 6771206), (52, 4948189), (62, 4150094), (76, 3385603), (124, 2075047), (247, 1041724), (271, 949468), (403, 638476), (494, 520862), (542, 474734), (589, 436852), (806, 319238), (961, 267748), (988, 260431), (1084, 237367), (1178, 218426), (1612, 159619), (1922, 133874), (2356, 109213), (3523, 73036), (3844, 66937), (5149, 49972), (7046, 36518), (7657, 33604), (8401, 30628), (10298, 24986), (12493, 20596), (14092, 18259), (15314, 16802)]