21171941

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{179}}^1\times {\mathrm{277}}^1$

素因数の和:524

約数の個数: 16

約数和(自身を含む): 24819840

約数和(自身を除く): 3647899

約数列:

[1, 7, 61, 179, 277, 427, 1253, 1939, 10919, 16897, 49583, 76433, 118279, 347081, 3024563, 21171941]

約数ペア:

[(1, 21171941), (7, 3024563), (61, 347081), (179, 118279), (277, 76433), (427, 49583), (1253, 16897), (1939, 10919)]