20981377

素因数分解:

${\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{421}}^1$

素因数の和:544

約数の個数: 16

約数和(自身を含む): 23024320

約数和(自身を除く): 2042943

約数列:

[1, 19, 43, 61, 421, 817, 1159, 2623, 7999, 18103, 25681, 49837, 343957, 487939, 1104283, 20981377]

約数ペア:

[(1, 20981377), (19, 1104283), (43, 487939), (61, 343957), (421, 49837), (817, 25681), (1159, 18103), (2623, 7999)]