21897615

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{1087}}^1$

素因数の和:1191

約数の個数: 32

約数和(自身を含む): 37601280

約数和(自身を除く): 15703665

約数列:

[1, 3, 5, 15, 17, 51, 79, 85, 237, 255, 395, 1087, 1185, 1343, 3261, 4029, 5435, 6715, 16305, 18479, 20145, 55437, 85873, 92395, 257619, 277185, 429365, 1288095, 1459841, 4379523, 7299205, 21897615]

約数ペア:

[(1, 21897615), (3, 7299205), (5, 4379523), (15, 1459841), (17, 1288095), (51, 429365), (79, 277185), (85, 257619), (237, 92395), (255, 85873), (395, 55437), (1087, 20145), (1185, 18479), (1343, 16305), (3261, 6715), (4029, 5435)]