81361168

素因数分解:

$2^4\times 7^2\times {\mathrm{157}}^1\times {\mathrm{661}}^1$

素因数の和:840

約数の個数: 60

約数和(自身を含む): 184821132

約数和(自身を除く): 103459964

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 98, 112, 157, 196, 314, 392, 628, 661, 784, 1099, 1256, 1322, 2198, 2512, 2644, 4396, 4627, 5288, 7693, 8792, 9254, 10576, 15386, 17584, 18508, 30772, 32389, 37016, 61544, 64778, 74032, 103777, 123088, 129556, 207554, 259112, 415108, 518224, 726439, 830216, 1452878, 1660432, 2905756, 5085073, 5811512, 10170146, 11623024, 20340292, 40680584, 81361168]

約数ペア:

[(1, 81361168), (2, 40680584), (4, 20340292), (7, 11623024), (8, 10170146), (14, 5811512), (16, 5085073), (28, 2905756), (49, 1660432), (56, 1452878), (98, 830216), (112, 726439), (157, 518224), (196, 415108), (314, 259112), (392, 207554), (628, 129556), (661, 123088), (784, 103777), (1099, 74032), (1256, 64778), (1322, 61544), (2198, 37016), (2512, 32389), (2644, 30772), (4396, 18508), (4627, 17584), (5288, 15386), (7693, 10576), (8792, 9254)]