20891181

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:261

約数の個数: 32

約数和(自身を含む): 30820608

約数和(自身を除く): 9929427

約数列:

[1, 3, 17, 41, 51, 97, 103, 123, 291, 309, 697, 1649, 1751, 2091, 3977, 4223, 4947, 5253, 9991, 11931, 12669, 29973, 67609, 71791, 169847, 202827, 215373, 409631, 509541, 1228893, 6963727, 20891181]

約数ペア:

[(1, 20891181), (3, 6963727), (17, 1228893), (41, 509541), (51, 409631), (97, 215373), (103, 202827), (123, 169847), (291, 71791), (309, 67609), (697, 29973), (1649, 12669), (1751, 11931), (2091, 9991), (3977, 5253), (4223, 4947)]