20921559

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{9781}}^1$

素因数の和:9838

約数の個数: 16

約数和(自身を含む): 30050304

約数和(自身を除く): 9128745

約数列:

[1, 3, 23, 31, 69, 93, 713, 2139, 9781, 29343, 224963, 303211, 674889, 909633, 6973853, 20921559]

約数ペア:

[(1, 20921559), (3, 6973853), (23, 909633), (31, 674889), (69, 303211), (93, 224963), (713, 29343), (2139, 9781)]