21351113

素因数分解:

$7^2\times {\mathrm{47}}^1\times {\mathrm{73}}^1\times {\mathrm{127}}^1$

素因数の和:261

約数の個数: 24

約数和(自身を含む): 25915392

約数和(自身を除く): 4564279

約数列:

[1, 7, 47, 49, 73, 127, 329, 511, 889, 2303, 3431, 3577, 5969, 6223, 9271, 24017, 41783, 64897, 168119, 292481, 435737, 454279, 3050159, 21351113]

約数ペア:

[(1, 21351113), (7, 3050159), (47, 454279), (49, 435737), (73, 292481), (127, 168119), (329, 64897), (511, 41783), (889, 24017), (2303, 9271), (3431, 6223), (3577, 5969)]