21978913

素因数分解:

${\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{101}}^1\times {\mathrm{271}}^1$

素因数の和:456

約数の個数: 16

約数和(自身を含む): 24636672

約数和(自身を除く): 2657759

約数列:

[1, 11, 73, 101, 271, 803, 1111, 2981, 7373, 19783, 27371, 81103, 217613, 301081, 1998083, 21978913]

約数ペア:

[(1, 21978913), (11, 1998083), (73, 301081), (101, 217613), (271, 81103), (803, 27371), (1111, 19783), (2981, 7373)]