2809891

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{571}}^1$

素因数の和:634

約数の個数: 16

約数和(自身を含む): 3477760

約数和(自身を除く): 667869

約数列:

[1, 7, 19, 37, 133, 259, 571, 703, 3997, 4921, 10849, 21127, 75943, 147889, 401413, 2809891]

約数ペア:

[(1, 2809891), (7, 401413), (19, 147889), (37, 75943), (133, 21127), (259, 10849), (571, 4921), (703, 3997)]