21231921

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{6547}}^1$

素因数の和:6620

約数の個数: 16

約数和(自身を含む): 30173184

約数和(自身を除く): 8941263

約数列:

[1, 3, 23, 47, 69, 141, 1081, 3243, 6547, 19641, 150581, 307709, 451743, 923127, 7077307, 21231921]

約数ペア:

[(1, 21231921), (3, 7077307), (23, 923127), (47, 451743), (69, 307709), (141, 150581), (1081, 19641), (3243, 6547)]