21207804956

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{407842403}}^1$

素因数の和:407842420

約数の個数: 12

約数和(自身を含む): 39968555592

約数和(自身を除く): 18760750636

約数列:

[1, 2, 4, 13, 26, 52, 407842403, 815684806, 1631369612, 5301951239, 10603902478, 21207804956]

約数ペア:

[(1, 21207804956), (2, 10603902478), (4, 5301951239), (13, 1631369612), (26, 815684806), (52, 407842403)]