20971797

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{90787}}^1$

素因数の和:90808

約数の個数: 16

約数和(自身を含む): 34862592

約数和(自身を除く): 13890795

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 90787, 272361, 635509, 998657, 1906527, 2995971, 6990599, 20971797]

約数ペア:

[(1, 20971797), (3, 6990599), (7, 2995971), (11, 1906527), (21, 998657), (33, 635509), (77, 272361), (231, 90787)]