21281254

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{281}}^1\times {\mathrm{1993}}^1$

素因数の和:2295

約数の個数: 16

約数和(自身を含む): 33738480

約数和(自身を除く): 12457226

約数列:

[1, 2, 19, 38, 281, 562, 1993, 3986, 5339, 10678, 37867, 75734, 560033, 1120066, 10640627, 21281254]

約数ペア:

[(1, 21281254), (2, 10640627), (19, 1120066), (38, 560033), (281, 75734), (562, 37867), (1993, 10678), (3986, 5339)]