21557989

素因数分解:

${\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{2153}}^1$

素因数の和:2220

約数の個数: 16

約数和(自身を含む): 24814080

約数和(自身を除く): 3256091

約数列:

[1, 17, 19, 31, 323, 527, 589, 2153, 10013, 36601, 40907, 66743, 695419, 1134631, 1268117, 21557989]

約数ペア:

[(1, 21557989), (17, 1268117), (19, 1134631), (31, 695419), (323, 66743), (527, 40907), (589, 36601), (2153, 10013)]