21913359

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{179}}^1$

素因数の和:311

約数の個数: 32

約数和(自身を含む): 32820480

約数和(自身を除く): 10907121

約数列:

[1, 3, 13, 39, 43, 73, 129, 179, 219, 537, 559, 949, 1677, 2327, 2847, 3139, 6981, 7697, 9417, 13067, 23091, 39201, 40807, 100061, 122421, 169871, 300183, 509613, 561881, 1685643, 7304453, 21913359]

約数ペア:

[(1, 21913359), (3, 7304453), (13, 1685643), (39, 561881), (43, 509613), (73, 300183), (129, 169871), (179, 122421), (219, 100061), (537, 40807), (559, 39201), (949, 23091), (1677, 13067), (2327, 9417), (2847, 7697), (3139, 6981)]