640053

素因数分解:

$3^2\times {\mathrm{19}}^2\times {\mathrm{197}}^1$

素因数の和:241

約数の個数: 18

約数和(自身を含む): 980694

約数和(自身を除く): 340641

約数列:

[1, 3, 9, 19, 57, 171, 197, 361, 591, 1083, 1773, 3249, 3743, 11229, 33687, 71117, 213351, 640053]

約数ペア:

[(1, 640053), (3, 213351), (9, 71117), (19, 33687), (57, 11229), (171, 3743), (197, 3249), (361, 1773), (591, 1083)]