21551719

素因数分解:

$7^3\times {\mathrm{19}}^1\times {\mathrm{3307}}^1$

素因数の和:3347

約数の個数: 16

約数和(自身を含む): 26464000

約数和(自身を除く): 4912281

約数列:

[1, 7, 19, 49, 133, 343, 931, 3307, 6517, 23149, 62833, 162043, 439831, 1134301, 3078817, 21551719]

約数ペア:

[(1, 21551719), (7, 3078817), (19, 1134301), (49, 439831), (133, 162043), (343, 62833), (931, 23149), (3307, 6517)]