21208143

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{239}}^1\times {\mathrm{2689}}^1$

素因数の和:2942

約数の個数: 16

約数和(自身を含む): 30988800

約数和(自身を除く): 9780657

約数列:

[1, 3, 11, 33, 239, 717, 2629, 2689, 7887, 8067, 29579, 88737, 642671, 1928013, 7069381, 21208143]

約数ペア:

[(1, 21208143), (3, 7069381), (11, 1928013), (33, 642671), (239, 88737), (717, 29579), (2629, 8067), (2689, 7887)]