21209293

素因数分解:

$7^1\times {\mathrm{101}}^1\times {\mathrm{131}}^1\times {\mathrm{229}}^1$

素因数の和:468

約数の個数: 16

約数和(自身を含む): 24773760

約数和(自身を除く): 3564467

約数列:

[1, 7, 101, 131, 229, 707, 917, 1603, 13231, 23129, 29999, 92617, 161903, 209993, 3029899, 21209293]

約数ペア:

[(1, 21209293), (7, 3029899), (101, 209993), (131, 161903), (229, 92617), (707, 29999), (917, 23129), (1603, 13231)]