209980989

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{457}}^1\times {\mathrm{2687}}^1$

素因数の和:3169

約数の個数: 24

約数和(自身を含む): 320087040

約数和(自身を除く): 110106051

約数列:

[1, 3, 9, 19, 57, 171, 457, 1371, 2687, 4113, 8061, 8683, 24183, 26049, 51053, 78147, 153159, 459477, 1227959, 3683877, 11051631, 23331221, 69993663, 209980989]

約数ペア:

[(1, 209980989), (3, 69993663), (9, 23331221), (19, 11051631), (57, 3683877), (171, 1227959), (457, 459477), (1371, 153159), (2687, 78147), (4113, 51053), (8061, 26049), (8683, 24183)]