20961681

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{4931}}^1$

素因数の和:5056

約数の個数: 16

約数和(自身を含む): 30381120

約数和(自身を除く): 9419439

約数列:

[1, 3, 13, 39, 109, 327, 1417, 4251, 4931, 14793, 64103, 192309, 537479, 1612437, 6987227, 20961681]

約数ペア:

[(1, 20961681), (3, 6987227), (13, 1612437), (39, 537479), (109, 192309), (327, 64103), (1417, 14793), (4251, 4931)]