21356973

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{71909}}^1$

素因数の和:71929

約数の個数: 16

約数和(自身を含む): 34516800

約数和(自身を除く): 13159827

約数列:

[1, 3, 9, 11, 27, 33, 99, 297, 71909, 215727, 647181, 790999, 1941543, 2372997, 7118991, 21356973]

約数ペア:

[(1, 21356973), (3, 7118991), (9, 2372997), (11, 1941543), (27, 790999), (33, 647181), (99, 215727), (297, 71909)]