21511568

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{103421}}^1$

素因数の和:103442

約数の個数: 20

約数和(自身を含む): 44885148

約数和(自身を除く): 23373580

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 103421, 206842, 413684, 827368, 1344473, 1654736, 2688946, 5377892, 10755784, 21511568]

約数ペア:

[(1, 21511568), (2, 10755784), (4, 5377892), (8, 2688946), (13, 1654736), (16, 1344473), (26, 827368), (52, 413684), (104, 206842), (208, 103421)]