20381640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:231

約数の個数: 128

約数和(自身を含む): 66044160

約数和(自身を除く): 45662520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 34, 40, 51, 60, 68, 85, 97, 102, 103, 120, 136, 170, 194, 204, 206, 255, 291, 309, 340, 388, 408, 412, 485, 510, 515, 582, 618, 680, 776, 824, 970, 1020, 1030, 1164, 1236, 1455, 1545, 1649, 1751, 1940, 2040, 2060, 2328, 2472, 2910, 3090, 3298, 3502, 3880, 4120, 4947, 5253, 5820, 6180, 6596, 7004, 8245, 8755, 9894, 9991, 10506, 11640, 12360, 13192, 14008, 16490, 17510, 19788, 19982, 21012, 24735, 26265, 29973, 32980, 35020, 39576, 39964, 42024, 49470, 49955, 52530, 59946, 65960, 70040, 79928, 98940, 99910, 105060, 119892, 149865, 169847, 197880, 199820, 210120, 239784, 299730, 339694, 399640, 509541, 599460, 679388, 849235, 1019082, 1198920, 1358776, 1698470, 2038164, 2547705, 3396940, 4076328, 5095410, 6793880, 10190820, 20381640]

約数ペア:

[(1, 20381640), (2, 10190820), (3, 6793880), (4, 5095410), (5, 4076328), (6, 3396940), (8, 2547705), (10, 2038164), (12, 1698470), (15, 1358776), (17, 1198920), (20, 1019082), (24, 849235), (30, 679388), (34, 599460), (40, 509541), (51, 399640), (60, 339694), (68, 299730), (85, 239784), (97, 210120), (102, 199820), (103, 197880), (120, 169847), (136, 149865), (170, 119892), (194, 105060), (204, 99910), (206, 98940), (255, 79928), (291, 70040), (309, 65960), (340, 59946), (388, 52530), (408, 49955), (412, 49470), (485, 42024), (510, 39964), (515, 39576), (582, 35020), (618, 32980), (680, 29973), (776, 26265), (824, 24735), (970, 21012), (1020, 19982), (1030, 19788), (1164, 17510), (1236, 16490), (1455, 14008), (1545, 13192), (1649, 12360), (1751, 11640), (1940, 10506), (2040, 9991), (2060, 9894), (2328, 8755), (2472, 8245), (2910, 7004), (3090, 6596), (3298, 6180), (3502, 5820), (3880, 5253), (4120, 4947)]