31718239

素因数分解:

$7^3\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1$

素因数の和:228

約数の個数: 32

約数和(自身を含む): 40448000

約数和(自身を除く): 8729761

約数列:

[1, 7, 19, 31, 49, 133, 157, 217, 343, 589, 931, 1099, 1519, 2983, 4123, 4867, 6517, 7693, 10633, 20881, 28861, 34069, 53851, 92473, 146167, 202027, 238483, 647311, 1023169, 1669381, 4531177, 31718239]

約数ペア:

[(1, 31718239), (7, 4531177), (19, 1669381), (31, 1023169), (49, 647311), (133, 238483), (157, 202027), (217, 146167), (343, 92473), (589, 53851), (931, 34069), (1099, 28861), (1519, 20881), (2983, 10633), (4123, 7693), (4867, 6517)]