20970159

素因数分解:

$3^1\times 7^1\times {\mathrm{643}}^1\times {\mathrm{1553}}^1$

素因数の和:2206

約数の個数: 16

約数和(自身を含む): 32024832

約数和(自身を除く): 11054673

約数列:

[1, 3, 7, 21, 643, 1553, 1929, 4501, 4659, 10871, 13503, 32613, 998579, 2995737, 6990053, 20970159]

約数ペア:

[(1, 20970159), (3, 6990053), (7, 2995737), (21, 998579), (643, 32613), (1553, 13503), (1929, 10871), (4501, 4659)]