21357809

素因数分解:

${\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{149}}^1\times {\mathrm{157}}^1$

素因数の和:400

約数の個数: 16

約数和(自身を含む): 23889600

約数和(自身を除く): 2531791

約数列:

[1, 11, 83, 149, 157, 913, 1639, 1727, 12367, 13031, 23393, 136037, 143341, 257323, 1941619, 21357809]

約数ペア:

[(1, 21357809), (11, 1941619), (83, 257323), (149, 143341), (157, 136037), (913, 23393), (1639, 13031), (1727, 12367)]