257118328

素因数分解:

$2^3\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{20201}}^1$

素因数の和:20287

約数の個数: 32

約数和(自身を含む): 506666160

約数和(自身を除く): 249547832

約数列:

[1, 2, 4, 8, 37, 43, 74, 86, 148, 172, 296, 344, 1591, 3182, 6364, 12728, 20201, 40402, 80804, 161608, 747437, 868643, 1494874, 1737286, 2989748, 3474572, 5979496, 6949144, 32139791, 64279582, 128559164, 257118328]

約数ペア:

[(1, 257118328), (2, 128559164), (4, 64279582), (8, 32139791), (37, 6949144), (43, 5979496), (74, 3474572), (86, 2989748), (148, 1737286), (172, 1494874), (296, 868643), (344, 747437), (1591, 161608), (3182, 80804), (6364, 40402), (12728, 20201)]