20857599

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4663}}^1$

素因数の和:4747

約数の個数: 24

約数和(自身を含む): 34924032

約数和(自身を除く): 14066433

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 4663, 13989, 32641, 41967, 97923, 293769, 331073, 993219, 2317511, 2979657, 6952533, 20857599]

約数ペア:

[(1, 20857599), (3, 6952533), (7, 2979657), (9, 2317511), (21, 993219), (63, 331073), (71, 293769), (213, 97923), (497, 41967), (639, 32641), (1491, 13989), (4473, 4663)]