21172899

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{43}}^2\times {\mathrm{347}}^1$

素因数の和:447

約数の個数: 24

約数和(自身を含む): 31620672

約数和(自身を除く): 10447773

約数列:

[1, 3, 11, 33, 43, 129, 347, 473, 1041, 1419, 1849, 3817, 5547, 11451, 14921, 20339, 44763, 61017, 164131, 492393, 641603, 1924809, 7057633, 21172899]

約数ペア:

[(1, 21172899), (3, 7057633), (11, 1924809), (33, 641603), (43, 492393), (129, 164131), (347, 61017), (473, 44763), (1041, 20339), (1419, 14921), (1849, 11451), (3817, 5547)]