21069681

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{3253}}^1$

素因数の和:3400

約数の個数: 16

約数和(自身を含む): 29988864

約数和(自身を除く): 8919183

約数列:

[1, 3, 17, 51, 127, 381, 2159, 3253, 6477, 9759, 55301, 165903, 413131, 1239393, 7023227, 21069681]

約数ペア:

[(1, 21069681), (3, 7023227), (17, 1239393), (51, 413131), (127, 165903), (381, 55301), (2159, 9759), (3253, 6477)]