21254919

素因数分解:

$3^1\times 7^1\times {\mathrm{641}}^1\times {\mathrm{1579}}^1$

素因数の和:2230

約数の個数: 16

約数和(自身を含む): 32459520

約数和(自身を除く): 11204601

約数列:

[1, 3, 7, 21, 641, 1579, 1923, 4487, 4737, 11053, 13461, 33159, 1012139, 3036417, 7084973, 21254919]

約数ペア:

[(1, 21254919), (3, 7084973), (7, 3036417), (21, 1012139), (641, 33159), (1579, 13461), (1923, 11053), (4487, 4737)]