21389511

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{683}}^1$

素因数の和:783

約数の個数: 32

約数和(自身を含む): 34013952

約数和(自身を除く): 12624441

約数列:

[1, 3, 11, 13, 33, 39, 73, 143, 219, 429, 683, 803, 949, 2049, 2409, 2847, 7513, 8879, 10439, 22539, 26637, 31317, 49859, 97669, 149577, 293007, 548449, 648167, 1645347, 1944501, 7129837, 21389511]

約数ペア:

[(1, 21389511), (3, 7129837), (11, 1944501), (13, 1645347), (33, 648167), (39, 548449), (73, 293007), (143, 149577), (219, 97669), (429, 49859), (683, 31317), (803, 26637), (949, 22539), (2049, 10439), (2409, 8879), (2847, 7513)]