261981480

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{317}}^1$

素因数の和:499

約数の個数: 128

約数和(自身を含む): 807770880

約数和(自身を除く): 545789400

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 71, 97, 120, 142, 194, 213, 284, 291, 317, 355, 388, 426, 485, 568, 582, 634, 710, 776, 852, 951, 970, 1065, 1164, 1268, 1420, 1455, 1585, 1704, 1902, 1940, 2130, 2328, 2536, 2840, 2910, 3170, 3804, 3880, 4260, 4755, 5820, 6340, 6887, 7608, 8520, 9510, 11640, 12680, 13774, 19020, 20661, 22507, 27548, 30749, 34435, 38040, 41322, 45014, 55096, 61498, 67521, 68870, 82644, 90028, 92247, 103305, 112535, 122996, 135042, 137740, 153745, 165288, 180056, 184494, 206610, 225070, 245992, 270084, 275480, 307490, 337605, 368988, 413220, 450140, 461235, 540168, 614980, 675210, 737976, 826440, 900280, 922470, 1229960, 1350420, 1844940, 2183179, 2700840, 3689880, 4366358, 6549537, 8732716, 10915895, 13099074, 17465432, 21831790, 26198148, 32747685, 43663580, 52396296, 65495370, 87327160, 130990740, 261981480]

約数ペア:

[(1, 261981480), (2, 130990740), (3, 87327160), (4, 65495370), (5, 52396296), (6, 43663580), (8, 32747685), (10, 26198148), (12, 21831790), (15, 17465432), (20, 13099074), (24, 10915895), (30, 8732716), (40, 6549537), (60, 4366358), (71, 3689880), (97, 2700840), (120, 2183179), (142, 1844940), (194, 1350420), (213, 1229960), (284, 922470), (291, 900280), (317, 826440), (355, 737976), (388, 675210), (426, 614980), (485, 540168), (568, 461235), (582, 450140), (634, 413220), (710, 368988), (776, 337605), (852, 307490), (951, 275480), (970, 270084), (1065, 245992), (1164, 225070), (1268, 206610), (1420, 184494), (1455, 180056), (1585, 165288), (1704, 153745), (1902, 137740), (1940, 135042), (2130, 122996), (2328, 112535), (2536, 103305), (2840, 92247), (2910, 90028), (3170, 82644), (3804, 68870), (3880, 67521), (4260, 61498), (4755, 55096), (5820, 45014), (6340, 41322), (6887, 38040), (7608, 34435), (8520, 30749), (9510, 27548), (11640, 22507), (12680, 20661), (13774, 19020)]