19640457

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{937}}^1$

素因数の和:1097

約数の個数: 24

約数和(自身を含む): 30289896

約数和(自身を除く): 10649439

約数列:

[1, 3, 9, 17, 51, 137, 153, 411, 937, 1233, 2329, 2811, 6987, 8433, 15929, 20961, 47787, 128369, 143361, 385107, 1155321, 2182273, 6546819, 19640457]

約数ペア:

[(1, 19640457), (3, 6546819), (9, 2182273), (17, 1155321), (51, 385107), (137, 143361), (153, 128369), (411, 47787), (937, 20961), (1233, 15929), (2329, 8433), (2811, 6987)]