15781989

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{137}}^1$

素因数の和:249

約数の個数: 32

約数和(自身を含む): 23316480

約数和(自身を除く): 7534491

約数列:

[1, 3, 19, 43, 47, 57, 129, 137, 141, 411, 817, 893, 2021, 2451, 2603, 2679, 5891, 6063, 6439, 7809, 17673, 19317, 38399, 111929, 115197, 122341, 276877, 335787, 367023, 830631, 5260663, 15781989]

約数ペア:

[(1, 15781989), (3, 5260663), (19, 830631), (43, 367023), (47, 335787), (57, 276877), (129, 122341), (137, 115197), (141, 111929), (411, 38399), (817, 19317), (893, 17673), (2021, 7809), (2451, 6439), (2603, 6063), (2679, 5891)]