21001519

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{311}}^1\times {\mathrm{877}}^1$

素因数の和:1206

約数の個数: 16

約数和(自身を含む): 26297856

約数和(自身を除く): 5296337

約数列:

[1, 7, 11, 77, 311, 877, 2177, 3421, 6139, 9647, 23947, 67529, 272747, 1909229, 3000217, 21001519]

約数ペア:

[(1, 21001519), (7, 3000217), (11, 1909229), (77, 272747), (311, 67529), (877, 23947), (2177, 9647), (3421, 6139)]