21261656

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{204439}}^1$

素因数の和:204458

約数の個数: 16

約数和(自身を含む): 42932400

約数和(自身を除く): 21670744

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 204439, 408878, 817756, 1635512, 2657707, 5315414, 10630828, 21261656]

約数ペア:

[(1, 21261656), (2, 10630828), (4, 5315414), (8, 2657707), (13, 1635512), (26, 817756), (52, 408878), (104, 204439)]