81215205

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{293}}^1\times {\mathrm{1087}}^1$

素因数の和:1405

約数の個数: 32

約数和(自身を含む): 138184704

約数和(自身を除く): 56969499

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 293, 879, 1087, 1465, 3261, 4395, 4981, 5435, 14943, 16305, 18479, 24905, 55437, 74715, 92395, 277185, 318491, 955473, 1592455, 4777365, 5414347, 16243041, 27071735, 81215205]

約数ペア:

[(1, 81215205), (3, 27071735), (5, 16243041), (15, 5414347), (17, 4777365), (51, 1592455), (85, 955473), (255, 318491), (293, 277185), (879, 92395), (1087, 74715), (1465, 55437), (3261, 24905), (4395, 18479), (4981, 16305), (5435, 14943)]