21000340784

素因数分解:

$2^4\times {\mathrm{1657}}^1\times {\mathrm{792107}}^1$

素因数の和:793772

約数の個数: 20

約数和(自身を含む): 40712766984

約数和(自身を除く): 19712426200

約数列:

[1, 2, 4, 8, 16, 1657, 3314, 6628, 13256, 26512, 792107, 1584214, 3168428, 6336856, 12673712, 1312521299, 2625042598, 5250085196, 10500170392, 21000340784]

約数ペア:

[(1, 21000340784), (2, 10500170392), (4, 5250085196), (8, 2625042598), (16, 1312521299), (1657, 12673712), (3314, 6336856), (6628, 3168428), (13256, 1584214), (26512, 792107)]