21251710

素因数分解:

$2^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{15289}}^1$

素因数の和:15435

約数の個数: 16

約数和(自身を含む): 38530800

約数和(自身を除く): 17279090

約数列:

[1, 2, 5, 10, 139, 278, 695, 1390, 15289, 30578, 76445, 152890, 2125171, 4250342, 10625855, 21251710]

約数ペア:

[(1, 21251710), (2, 10625855), (5, 4250342), (10, 2125171), (139, 152890), (278, 76445), (695, 30578), (1390, 15289)]