21209954

素因数分解:

$2^1\times {\mathrm{37}}^1\times {\mathrm{443}}^1\times {\mathrm{647}}^1$

素因数の和:1129

約数の個数: 16

約数和(自身を含む): 32799168

約数和(自身を除く): 11589214

約数列:

[1, 2, 37, 74, 443, 647, 886, 1294, 16391, 23939, 32782, 47878, 286621, 573242, 10604977, 21209954]

約数ペア:

[(1, 21209954), (2, 10604977), (37, 573242), (74, 286621), (443, 47878), (647, 32782), (886, 23939), (1294, 16391)]