81227905

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:190

約数の個数: 48

約数和(自身を含む): 113992704

約数和(自身を除く): 32764799

約数列:

[1, 5, 11, 31, 55, 61, 71, 121, 155, 305, 341, 355, 605, 671, 781, 1705, 1891, 2201, 3355, 3751, 3905, 4331, 7381, 8591, 9455, 11005, 18755, 20801, 21655, 24211, 36905, 42955, 47641, 104005, 121055, 134261, 228811, 238205, 266321, 524051, 671305, 1144055, 1331605, 1476871, 2620255, 7384355, 16245581, 81227905]

約数ペア:

[(1, 81227905), (5, 16245581), (11, 7384355), (31, 2620255), (55, 1476871), (61, 1331605), (71, 1144055), (121, 671305), (155, 524051), (305, 266321), (341, 238205), (355, 228811), (605, 134261), (671, 121055), (781, 104005), (1705, 47641), (1891, 42955), (2201, 36905), (3355, 24211), (3751, 21655), (3905, 20801), (4331, 18755), (7381, 11005), (8591, 9455)]