21313521

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{127}}^1\times {\mathrm{643}}^1$

素因数の和:805

約数の個数: 24

約数和(自身を含む): 32148480

約数和(自身を除く): 10834959

約数列:

[1, 3, 9, 29, 87, 127, 261, 381, 643, 1143, 1929, 3683, 5787, 11049, 18647, 33147, 55941, 81661, 167823, 244983, 734949, 2368169, 7104507, 21313521]

約数ペア:

[(1, 21313521), (3, 7104507), (9, 2368169), (29, 734949), (87, 244983), (127, 167823), (261, 81661), (381, 55941), (643, 33147), (1143, 18647), (1929, 11049), (3683, 5787)]