21380919

素因数分解:

$3^1\times 7^1\times {\mathrm{401}}^1\times {\mathrm{2539}}^1$

素因数の和:2950

約数の個数: 16

約数和(自身を含む): 32674560

約数和(自身を除く): 11293641

約数列:

[1, 3, 7, 21, 401, 1203, 2539, 2807, 7617, 8421, 17773, 53319, 1018139, 3054417, 7126973, 21380919]

約数ペア:

[(1, 21380919), (3, 7126973), (7, 3054417), (21, 1018139), (401, 53319), (1203, 17773), (2539, 8421), (2807, 7617)]