21995141

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{2803}}^1$

素因数の和:2888

約数の個数: 16

約数和(自身を含む): 26918400

約数和(自身を除く): 4923259

約数列:

[1, 7, 19, 59, 133, 413, 1121, 2803, 7847, 19621, 53257, 165377, 372799, 1157639, 3142163, 21995141]

約数ペア:

[(1, 21995141), (7, 3142163), (19, 1157639), (59, 372799), (133, 165377), (413, 53257), (1121, 19621), (2803, 7847)]