21945399

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{55001}}^1$

素因数の和:55030

約数の個数: 16

約数和(自身を含む): 35201280

約数和(自身を除く): 13255881

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 55001, 165003, 385007, 1045019, 1155021, 3135057, 7315133, 21945399]

約数ペア:

[(1, 21945399), (3, 7315133), (7, 3135057), (19, 1155021), (21, 1045019), (57, 385007), (133, 165003), (399, 55001)]