21243999

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{8501}}^1$

素因数の和:8535

約数の個数: 24

約数和(自身を含む): 34892208

約数和(自身を除く): 13648209

約数列:

[1, 3, 7, 17, 21, 49, 51, 119, 147, 357, 833, 2499, 8501, 25503, 59507, 144517, 178521, 416549, 433551, 1011619, 1249647, 3034857, 7081333, 21243999]

約数ペア:

[(1, 21243999), (3, 7081333), (7, 3034857), (17, 1249647), (21, 1011619), (49, 433551), (51, 416549), (119, 178521), (147, 144517), (357, 59507), (833, 25503), (2499, 8501)]