21381669

素因数分解:

$3^2\times {\mathrm{19}}^2\times {\mathrm{6581}}^1$

素因数の和:6625

約数の個数: 18

約数和(自身を含む): 32600646

約数和(自身を除く): 11218977

約数列:

[1, 3, 9, 19, 57, 171, 361, 1083, 3249, 6581, 19743, 59229, 125039, 375117, 1125351, 2375741, 7127223, 21381669]

約数ペア:

[(1, 21381669), (3, 7127223), (9, 2375741), (19, 1125351), (57, 375117), (171, 125039), (361, 59229), (1083, 19743), (3249, 6581)]