20571509

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{1129}}^1$

素因数の和:1292

約数の個数: 16

約数和(自身を含む): 24950400

約数和(自身を除く): 4378891

約数列:

[1, 7, 19, 133, 137, 959, 1129, 2603, 7903, 18221, 21451, 150157, 154673, 1082711, 2938787, 20571509]

約数ペア:

[(1, 20571509), (7, 2938787), (19, 1082711), (133, 154673), (137, 150157), (959, 21451), (1129, 18221), (2603, 7903)]