21491967

素因数分解:

$3^1\times 7^1\times {\mathrm{659}}^1\times {\mathrm{1553}}^1$

素因数の和:2222

約数の個数: 16

約数和(自身を含む): 32820480

約数和(自身を除く): 11328513

約数列:

[1, 3, 7, 21, 659, 1553, 1977, 4613, 4659, 10871, 13839, 32613, 1023427, 3070281, 7163989, 21491967]

約数ペア:

[(1, 21491967), (3, 7163989), (7, 3070281), (21, 1023427), (659, 32613), (1553, 13839), (1977, 10871), (4613, 4659)]