20609967

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{57731}}^1$

素因数の和:57758

約数の個数: 16

約数和(自身を含む): 33253632

約数和(自身を除く): 12643665

約数列:

[1, 3, 7, 17, 21, 51, 119, 357, 57731, 173193, 404117, 981427, 1212351, 2944281, 6869989, 20609967]

約数ペア:

[(1, 20609967), (3, 6869989), (7, 2944281), (17, 1212351), (21, 981427), (51, 404117), (119, 173193), (357, 57731)]