21755665

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{709}}^1$

素因数の和:769

約数の個数: 24

約数和(自身を含む): 29215080

約数和(自身を除く): 7459415

約数列:

[1, 5, 17, 19, 85, 95, 323, 361, 709, 1615, 1805, 3545, 6137, 12053, 13471, 30685, 60265, 67355, 229007, 255949, 1145035, 1279745, 4351133, 21755665]

約数ペア:

[(1, 21755665), (5, 4351133), (17, 1279745), (19, 1145035), (85, 255949), (95, 229007), (323, 67355), (361, 60265), (709, 30685), (1615, 13471), (1805, 12053), (3545, 6137)]