21399867

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{1543}}^1$

素因数の和:1639

約数の個数: 24

約数和(自身を含む): 32757504

約数和(自身を除く): 11357637

約数列:

[1, 3, 9, 23, 67, 69, 201, 207, 603, 1541, 1543, 4623, 4629, 13869, 13887, 35489, 103381, 106467, 310143, 319401, 930429, 2377763, 7133289, 21399867]

約数ペア:

[(1, 21399867), (3, 7133289), (9, 2377763), (23, 930429), (67, 319401), (69, 310143), (201, 106467), (207, 103381), (603, 35489), (1541, 13887), (1543, 13869), (4623, 4629)]