21250987

素因数分解:

${\mathrm{19}}^2\times {\mathrm{37}}^2\times {\mathrm{43}}^1$

素因数の和:155

約数の個数: 18

約数和(自身を含む): 23586948

約数和(自身を除く): 2335961

約数列:

[1, 19, 37, 43, 361, 703, 817, 1369, 1591, 13357, 15523, 26011, 30229, 58867, 494209, 574351, 1118473, 21250987]

約数ペア:

[(1, 21250987), (19, 1118473), (37, 574351), (43, 494209), (361, 58867), (703, 30229), (817, 26011), (1369, 15523), (1591, 13357)]