21881397

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{487}}^1\times {\mathrm{881}}^1$

素因数の和:1388

約数の個数: 16

約数和(自身を含む): 30989952

約数和(自身を除く): 9108555

約数列:

[1, 3, 17, 51, 487, 881, 1461, 2643, 8279, 14977, 24837, 44931, 429047, 1287141, 7293799, 21881397]

約数ペア:

[(1, 21881397), (3, 7293799), (17, 1287141), (51, 429047), (487, 44931), (881, 24837), (1461, 14977), (2643, 8279)]