21211729

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{3319}}^1$

素因数の和:3420

約数の個数: 16

約数和(自身を含む): 26772480

約数和(自身を除く): 5560751

約数列:

[1, 7, 11, 77, 83, 581, 913, 3319, 6391, 23233, 36509, 255563, 275477, 1928339, 3030247, 21211729]

約数ペア:

[(1, 21211729), (7, 3030247), (11, 1928339), (77, 275477), (83, 255563), (581, 36509), (913, 23233), (3319, 6391)]