81554438

素因数分解:

$2^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:225

約数の個数: 64

約数和(自身を含む): 152668800

約数和(自身を除く): 71114362

約数列:

[1, 2, 7, 14, 29, 37, 58, 61, 74, 89, 122, 178, 203, 259, 406, 427, 518, 623, 854, 1073, 1246, 1769, 2146, 2257, 2581, 3293, 3538, 4514, 5162, 5429, 6586, 7511, 10858, 12383, 15022, 15799, 18067, 23051, 24766, 31598, 36134, 38003, 46102, 65453, 76006, 95497, 130906, 157441, 190994, 200873, 314882, 401746, 458171, 668479, 916342, 1102087, 1336958, 1406111, 2204174, 2812222, 5825317, 11650634, 40777219, 81554438]

約数ペア:

[(1, 81554438), (2, 40777219), (7, 11650634), (14, 5825317), (29, 2812222), (37, 2204174), (58, 1406111), (61, 1336958), (74, 1102087), (89, 916342), (122, 668479), (178, 458171), (203, 401746), (259, 314882), (406, 200873), (427, 190994), (518, 157441), (623, 130906), (854, 95497), (1073, 76006), (1246, 65453), (1769, 46102), (2146, 38003), (2257, 36134), (2581, 31598), (3293, 24766), (3538, 23051), (4514, 18067), (5162, 15799), (5429, 15022), (6586, 12383), (7511, 10858)]